https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect#Statistical_and_better-than-average_effect
I thought this was a better explanation of how the DK effect is a stats artifact.
https://www.scientificamerican.com/article/the-dunning-kruger-effect-isnt-what-you-think-it-is/
https://economicsfromthetopdown.com/2022/04/08/the-dunning-kruger-effect-is-autocorrelation/