The Illusion of Expertise
As information has become more easily available, society has increasingly substituted accessible guidance for trained expertise. With the rise of social media, a new marketplace for advice has emerged. One where charisma, confidence, and follower count often carry more weight than qualifications or training. This is true even in domains where judgment, diagnosis, and context matter.
Evidence of this shift is visible. In one study, consumers were more likely to be influenced by skincare and beauty influencers than by dermatologists, although labeling someone an “expert influencer” did improve trust. Similarly, the Ontario Securities Commission found that about 35% of respondents reported making a financial decision based on advice from a finance influencer.
It’s not difficult to understand why.
For one, influencer advice is easier to access. On the surface, this is a clear benefit. Experts can be costly, while non-experts are free, charismatic, and relatable. Advice has been democratized, and anyone can learn from someone who appears to have succeeded at something.
But in that process, something subtle happens. Consumers of the advice mistake anecdotes for evidence, and they themselves become more confident in their knowledge.
Another consideration is how credibility is signaled. Experts rely on credentials, training and experience. Content creators, on the other hand, lead with visible outcomes that consumers may find more compelling.
A beauty influencer with glowing “glass skin”, or a finance creator sharing their trading account balance will naturally have greater pull. That kind of personal proof often feels more compelling than abstract knowledge or data.
At the same time, experts speak in probabilities, hedging their advice appropriately (“it depends on individual factors”, “in most cases”, “may not be appropriate for everyone”), while non-experts tend to speak confidently, in certainties without qualifiers or nuance.
That certainty is easier to sell to an audience that cannot distinguish confidence from expertise. Over time, low quality advice crowds out more rigorous expert insight.
As people spend more time on social media, the implications of this can be dire, as they begin to conflate misinformation with sound advice. A 2025 study in the UK found that roughly half of the top 100 videos on TikTok offering advice on trauma, depression, anxiety and other serious mental health conditions contained some form of misinformation.
Even where advice is directionally correct, oversimplification creates its own problem.
In finance, for example, much of the content revolves around a familiar set of ideas: save more, invest in a handful of low-cost ETFs, pay off high-interest debt. While useful, this repetition creates an illusion of completeness, as though financial decision-making is simple and universally applicable.
It isn’t.
This in turn creates overconfident consumers of finance content.
The value of true expertise lies in both depth and breadth. While content creators often focus on what is broadly applicable and easily digestible, experts are trained to assess individual circumstances and provide tailored solutions. Those who operate within professional frameworks are also bound by ethical and professional standards designed to protect the consumer.
The cost of bad advice is oftentimes not immediately apparent. It compounds in suboptimal decisions, misapplied strategies, and missed opportunities. And by the time it becomes visible, it is often too late to fully undo.
Ultimately, the value of expertise has not diminished. But it has been diluted by the illusion of expertise.