I have found that this is absolutely true, but not in the way you are thinking. The highest performing team I have been on had people from 4 continents, ran th

I have found that this is absolutely true, but not in the way you are thinking. The highest performing team I have been on had people from 4 continents, ran the gamut on political views, had disparate education levels (from literally a high school dropout to PhDs from prestigious schools), and had people of many races. It had no women and no black people. By the standards of HR, it was not a diverse team at all. The DEI folks I have worked with want a very specific kind of diversity: They want you to hire people of all genders and colors, but only rich ones from a few schools. They think that school reputation and awards are a better measure of aptitude than an interview or a take-home test (claiming that the test or interviewer is biased).