[ANewFormation]

You can create toy experiments to 'prove' just about anything - this is why social psychology has a replication rate in the 20% range. Though it's really much worse since that's only independently repeating the same experiments, not adversarially challenging hypotheses, at which point the entire field looks about as reliable as astrology. Quite appropriately since astrology, which was also studied as a 'science' for centuries, was highly influential on the founding fathers of modern psychology - Jung in particular.

And group differences are not only genetic. Why do you think that, for instance, 70% of American football or NBA players are black, while only 8% of baseball players are?

Go look at an average MBA classroom and know what you'll overwhelmingly see? Pretty much what a sampling of CEOs looks like, especially once accounting for performance.