Law school is a different ball game. And sorry, but it’s very believable that black students who got admitted due to AA would struggle more than their white and Asian classmates with stronger backgrounds.
I attended a well-regarded college and Georgetown Law School. You are right - college is like junior varsity, or even fresh/soph, football and law school, even a middle tier law school, is like varsity football. There is no way people who are admitted to law school through AA can thrive. A high percentage of them are either unable to pass the bar exam or barely pass the bar exam after a couple of tries and wind up working for the government or become community organizers.