If you have 100 people apply and 95 are white men (or 95 japanese/korean men if in Japan/korea), 4 are women and 1 is black then the best person for the job is probably going to be a white man / japanese man / korean man (depending on country) because by the percentages that's going to be the most likely.
So if you force a hire to be a woman or black man then you're picking someone that is most likely going to be terrible at the job, by the percentages. There is no surival of the fittest for women or black men, as their are white men / japanese men / korean men who are not very good at the job (if I applied to be a coder I would never get hired cause there are too many people better than me, if I was black I would get hired no matter how bad I am cause that's how DEI works). They will just hire anyone that shows any interest in that job if they tick the box, cause it's enforced hiring.
Also, the real argument here is why does there need to be population representative numbers of women or black people in these jobs if they obviously don't care about those careers in the first place to apply to them?
Is a black man a black man in the eyes of a white middle class manager or is he just a man, or just a human? why does a black man need to be hired if he is 1% of the applicants over everyone else? Well the reason is because they see race above all else, or sex or whatever else. We have moved so far away from "we are all the same" to "you are what the tick box is, and that's all that matters and that's all you'll ever be"
If I want to hire someone to write romance novels do I hire a hyper masculine black man for the sake of diversity and my virtue signalling needs, giving the readers a terrible book or do I just hire the person that will give the end users the best product? A middle aged woman who has been writing romance novels her whole life, similarily do I hire a middle aged woman to write star wars or a bald middle aged white guy that has been fixated with sci-fi and d&d all his life?
Ultimately DEI is all about virtue signalling for upper class / middle class white people in positions of management. That's why social media is bad, because they constantly want the world to know they have a massive E-virtue PP and want to wash themselves with the glow of likes and praise of their middle class pompous friends.
The argument for DEI from these people is that they know they are hiring utterly incompetent people, but this provides role models for aspiring young girls or black kids to want to achieve. In reality it's not doing that at all, most young girls still want to do jobs that fit their personalities and nature (nursing, sales, onlyfans (is the biggest growth career for women ironically) or generally jobs that don't take over your life) and most black guys want to be sports stars, singers or rappers. So this entire circus is doing nothing.