I'm afraid that the majority of the "affirmative action" students just were not up to standard. I taught one exception who was a smart, hard-working, motivated black guy. But in the five years that I taught there, he was the only one. I had probably 6-8 black students in my small class over that time -- their writing and analytical skills were just not up to par, and the gap was noticeable. There was one student who was actually sub-literate - couldn't spell, couldn't write a simple declarative English sentence, couldn't organize a paper. And she had a massive chip on her shoulder - I was failing her because she was black and I was white, yada yada yada. But there was no way even an affirmative-action administration could excuse her absolute inability to function in a law school. She disappeared after one semester.
Why the h@ll anybody admitted her is the mystery of the ages. There was no way she could take a degree, and all the experience was likely to do was reinforce her beliefs in the evil of the Man. And make life hard for the other black students by convincing people that affirmative action admits the totally incompetent (rather than just the somewhat below par, which was my general experience.)