Russell’s axiom was studied, and there is data to back it up.
The people who are bad at something tend to believe that they are exceptionally good at it, while people who are good at it always doubt in their hearts.
Amateurs are overconfident, and experts are underconfident.
Psychology has a term for this, “Dunning-Kruger effect.”
It is named after the two researchers who coined it. And the effect is widely seen in our everyday life.