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https://en.wikipedia.org/wiki/Illusory_superiority

[Edit: Interesting that there are multiple effects, e.g. the sibling comment, that refer to similar but distinct phenomena!]

That’s weird, because just think about how unskilled the average person is — and then realize that half of ‘em are even worse.

https://en.wikipedia.org/wiki/Overconfidence_effect

Isn't this sort of just the Dunning-Kruger effect?

No, Dunning Kruger is that skilled people are better at judging where they are on the skill spectrum.

This also explains why the best engineers are also the best at admitting what they don't know. Which is something we have worked into our interviews - amazing how easy it is to spot a poor engineer by asking what their latest failure was.

I think that's the opposite of Dunning-Kruger — impostor syndrome, or maybe "curse of knowledge".

When skilled people either underestimate how hard it is to do something, or gauge a complex task that they have expertise in as easier than it actually is.