> There's a legitimate business justification to diversity policies.

Based on personal observations, innate aptitude and interest doesn't seem to be aligned. Eg, one of the more amazing minds I've ever met was contained in a woman who just didn't have the competitive glint in her eye to make herself successful. Sad story in many ways.

But - if that observation is true - then diversity policy quotas will break the correlation. At the moment, about half the aptitude is in women, some percent in various minority groups in rough proportion to their prevalence, etc. Companies better at surfacing talent will naturally be more diverse. Companies that forcibly make themselves more diverse through a quota will ironically probably regress to the mean level of competence and perform worse.