Incompetent people think they’re great
You might have wondered, particularly over the last 5 or 6 years, why incompetent people don’t realize they’re incompetent. For example, 88% of drivers think they’re better than average at driving — which is mathematically impossible. It happens with all kinds of things. And the people who are the least competent overrate themselves to the greatest extent.
It even has a name — it’s called the Dunning-Kruger effect. David Dunning explains it on TED-Ed here:
Why incompetent people think they’re amazing – David Dunning