This argument, while important, is the low hanging fruit of the affirmative action debate in my opinion. We would not need affirmative action if legacy based admissions wasn't so prevalent in top schools. We would not need affirmative action if every school district in America recieved proper funding to support teachers and enable smaller class sizes, test prep for students to take specialized exams, and after school…
The result of that is that the bennificiaries of AA tend to be the members of the target group who least need the help, and for whom the underlying justification is least relevent.