Personally, I have a few thouhts:
* If we didn't have DEI (which in practice is really just the new AA (Affirmative Action)), would hetero-ethnic areas like Europe and US ever have balance in the workforce? Would society naturally trend towards ethnic balance in the workplace without DEI, or would we end up with a Gattaca? Is DEI necessary in that sense? Without DEI-like influences, would we just be stuck with a black valet and a white CEO?
* Psychologists have known for decades about "the tyranny of low expectations" - the tendency for lower expectations to lead to lower performance in humans. I wonder if long-term DEI will lead to performance imbalances as those who are favored by DEI become reliant on it. It's a scary thought to imagine in the long term.
* Personally, I think a small amount of temporary DEI exposure is required to offset the human's natural tendency to be hostile towards those of a different ethnicity. I think that if DEI exposure is either acute (a lot in a small time frame) or chronic (little bit over a long time frame), it is likely to lead to systemic negative consequences, such as performative imbalance and/or aggression/hatred between those favored and unfavored by DEI.
It's a really complex situation!