For at least 10 years all big companies have "equality & inclusivity" departments that are taking care of giving equal opportunities to "oppressed minorities" members. Is that just PR or something substantial?
The conclusion ("one generation lives in the environment without discrimination") doesn't come from the premise (that affirmative action was introduced 30 years ago).
Yes, affirmative action was introduced 30 years ago. But it hardly put an end to discrimination (among other reasons, because even if affirmative action was great, well applied and totally effective, discrimination is not constrained in the domains that affirmative action affects).
The issue is that D&I had no power to do things that actually matter. I've complained to D&I teams before and they really exist to placate people internally because leadership will never change. When something gets out that seems like a bad PR problem ("twitter"), then the leadership team will take acute action and fire someone and pin it on inclusion.
It's a bad system for everyone but it's born out of cyclical system where white people do nothing about racism until it reaches some breaking point, then they insist on taking immediate action to "fix it" for a month, then they go back to the same old.