Understanding what the Dunning-Kruger effect actually is:

The findings reported by Kruger and Dunning are often interpreted to suggest that the less competent people are, the more competent they think they are.

Unfortunately, Kruger and Dunning never actually provided any support for this type of just-world view; their studies categorically didn’t show that incompetent people are more confident or arrogant than competent people.

Rather, it’s that incompetent people think they’re much better than they actually are. But they typically still don’t think they’re quite as good as people who, you know, actually are good.

So there.