I am happy to answer this question; thank you for asking it.
To the broad question, I can say with absolute certainty that the practice of DEI ruins science. It doesn't make it a little bit worse; it destroys competence and capability, and you take away positions from the more competent and give them to the less competent or to the incompetent.
In sports, you never give positions based upon DEI, because you'll lose a game. The game we're trying to win here is the advancement of human civilization through science. It happens because of the best people who are absolutely committed.
My best Ph.D. student was a white woman who's Swiss, and she's a mini-me. She's a Swiss woman, but it doesn't matter. She was the best person, and now she's a professor in Germany. I've also seen women being given positions for which no men are allowed, and they're clearly less qualified. They have tenure and so forth, when they're clearly less qualified.