There’s a particular type of media guest that drives me up the wall: the expert who’s genuinely brilliant in their field but somehow convinced they’re equally qualified to pontificate about everything else.

You know the type. The epidemiologist who’s suddenly an expert on economic policy. The tech founder who’s certain they’ve solved education despite never having taught a class. The economist who’s positive they understand military strategy better than, you know, people who study military strategy.

Being very smart in one domain doesn’t make you smart in all domains. But try telling that to either the experts themselves or the media outlets that keep booking them.

The Halo Effect

The problem starts with how we perceive expertise. Someone demonstrates deep knowledge in a specific area, and we unconsciously assume that expertise transfers to adjacent—or sometimes completely unrelated—fields.

Psychologists call this the halo effect, and it’s powerful. If someone’s a brilliant physicist, we assume they’re probably also good at thinking about economics, politics, and social issues. Why? Because smart people are smart, right?

Except expertise doesn’t work that way. Deep knowledge in one field often comes from years of specialized study that actively precludes developing similar depth elsewhere. The physicist might understand quantum mechanics better than almost anyone alive, but that tells you precisely nothing about their grasp of macroeconomic policy.

The Confidence Problem

Here’s what makes it worse: people who achieve expertise in one field often develop confidence that extends beyond their knowledge.

They’ve been proven right repeatedly within their domain. They’ve had their insights validated and their theories confirmed. That creates a feedback loop where they start believing their analytical approach works on everything, even subjects where they lack foundational knowledge.

This is how you get tech executives explaining how to fix healthcare, or neuroscientists confidently asserting solutions to political problems they’ve never seriously studied. They’re not stupid—they’re extrapolating from expertise in one area to confidence in another where it’s not warranted.

The Media’s Role

Media outlets are complicit in this. They love booking “big thinkers” who can comment on multiple topics. It’s easier than finding actual experts for each subject. Plus, famous names drive clicks and ratings.

So the epidemiologist who became a household name during the pandemic gets asked about inflation. The AI researcher gets asked to weigh in on education reform. The economist gets questioned about climate policy.

Sometimes these experts acknowledge the limits of their knowledge. Often, they don’t. And either way, their comments get presented as authoritative simply because they’re authoritative on something else.

Organizations like AI automation services deal with this constantly—people assume that because they’re technical experts, they must have unique insights into business strategy, organizational change, or whatever else. Sometimes they do; often they’re just guessing like everyone else.

The Danger of Frameworks

Experts often try to apply their field’s frameworks to other domains, and this is where things get really messy.

An economist might try to analyze education purely through market dynamics. A physicist might approach social problems like they’re engineering challenges with optimal solutions. A business executive might think organizational management principles apply to government.

Sometimes cross-disciplinary thinking produces insights. But just as often, it produces oversimplified nonsense that ignores crucial context and complexity specific to the other field.

The framework that makes you an expert in one domain can make you dangerously wrong in another.

The Intellectual Celebrity Culture

We’ve created an intellectual celebrity culture where certain thinkers become go-to commentators on basically everything. They write books, give TED talks, appear on podcasts, and gradually their personal brand becomes divorced from their actual expertise.

At some point, they’re famous for being smart, not for being smart about any particular thing. And that’s when it gets dangerous, because their platform remains even as their commentary becomes increasingly untethered from real knowledge.

The Nuance Casualty

When experts comment outside their expertise, nuance is usually the first casualty.

A real expert in a field understands all the complexities, contradictions, and uncertainties. They know what we don’t know. They’re cautious about claiming definitive answers to complex questions.

But someone commenting from outside the field doesn’t have that built-in humility. They see the issue more simply than it actually is, which makes their commentary more confident and decisive—and often more wrong.

The Opposite Problem

Ironically, sometimes actual experts are terrible at public commentary about their own fields. They’re too deep in the weeds, too aware of complexities to communicate clearly, too hedged in their statements to be quotable.

So media outlets book people who are marginally less expert but much better at speaking in soundbites. The result is commentary that’s confidently wrong instead of hesitantly accurate.

There’s a sweet spot between too much expertise (can’t communicate) and too little (shouldn’t comment), but media incentives push away from that sweet spot in both directions.

The Twitter Academic

Social media has accelerated this problem. Academics and experts can now comment directly on anything without editorial mediation.

Some use this well—sharing genuine expertise, acknowledging limits, engaging thoughtfully with criticism. But many don’t. They pontificate on topics outside their knowledge base, get into heated arguments with actual experts in those fields, and double down when challenged.

The platform rewards hot takes over careful analysis, which creates incentives for experts to offer opinions on things they don’t really understand. And because they have credibility from their actual expertise, people listen.

The Public’s Appetite

We’re complicit too. Audiences want clear answers to complicated questions, preferably from someone who seems really smart.

We’d rather hear a confident opinion from a famous expert than a nuanced explanation from someone less well-known who actually studies the topic. We reward confidence over accuracy, decisiveness over appropriate uncertainty.

So the market keeps producing what we keep consuming: smart people saying things outside their expertise with unwarranted confidence.

The Interdisciplinary Exception

Not all cross-domain commentary is bad. Some problems genuinely benefit from interdisciplinary perspectives. Climate change needs input from climatologists, economists, engineers, and policymakers. Public health requires collaboration between medical experts, data scientists, and social scientists.

The difference is between genuine interdisciplinary work—where people from different fields collaborate while acknowledging their respective limitations—and experts from one field claiming authority in another.

One enriches understanding. The other muddies it.

What Good Looks Like

The best experts are clear about the boundaries of their knowledge. They’ll comment on their area of expertise confidently, and acknowledge uncertainty or defer to others outside it.

When they do venture opinions on adjacent topics, they’re explicit about when they’re speaking from expertise versus when they’re just thinking out loud as an interested observer.

That intellectual honesty is rare, which makes it valuable. And media outlets should reward it rather than constantly pushing for experts to comment beyond their knowledge.

The Path Forward

We need better norms around expert commentary. Media literacy that helps audiences distinguish between someone speaking from expertise versus someone speculating. Editorial standards that prioritize actual knowledge over name recognition.

And experts themselves need to be more disciplined about staying in their lanes—or at least being explicit when they’re not.

But that requires resisting institutional and personal incentives to be public intellectuals who comment on everything. And so far, not much evidence suggests that’s happening.

So we’ll keep getting epidemiologists explaining economics, tech founders solving education, and economists holding forth on military strategy.

At least until the next crisis, when we’ll briefly remember that expertise is specific and hard-won, before forgetting again as soon as the spotlight moves on.