>But it has a lot to do with how the claim in that paragraph is not true: homogenous teams are less effective in some measurable ways
As far as I'm aware there is a single contrived study which looked at financial metrics from boards with female representation to come to that conclusion. This is a tenet that activists desperately want to believe but flies in the face of conventional experience and basic reasoning. At the very lease some minimum common culture, like language, is necessary for a functioning team. How do you expect a team to function if half the members believe that traits like "independence" are toxic and words like "analysis" are offensive? That's culture too.
>Plus our society is not homogenous, so from what mechanism does the homogeneity of the team emerge? Is it completely benign and spurious?
Another recently popular fallacy used to justify these toxic policies. That a team is composed primarily of one demographic does not imply sexism. People who share cultural values and personality traits are likely to gravitate toward certain disciplines, it is an entirely emergent phenomenon and does not require invocation of discrimination to explain. For example, regardless of the amount of sexism actually present in the tech workplace, it is absurd to expect gender parity if one acknowledges that women are fundamentally less likely to be interested in programming in the first place, as a consequence of human nature.
These policies all feel great but are ultimately half baked, and the danger here is that for merely questioning them, as any rational person should, we risk our livelihoods. The consequences for society are bleak, as we are now explicitly prioritizing gender and race over competence. This is, ironically, top-down mandated systemic racism/sexism.
Edit: in fact I would go as far as to say that all communication is predicated upon common culture, because words, symbols, gestures, and inferred intentions are all inherently cultural. Even things like correcting mistakes of others and questioning seniors/elders are vary with culture. There is absolutely no reason to believe that diversity is an absolute good and cannot hamper communication and cooperation when certain cultures are mixed. We've gone totally off the rails because the same people pushing for these policies have created a system where their discussion is forbidden.