I think it depends on the goal. Is the goal to rank all students and then send the top X number of students acceptance letters? Or is the goal to set a baseline of what it takes to be an successful student at Yale and then select a diverse group of students that all meet that baseline criteria? The former makes it a direct competition between students. You have to choose if applicant A is better than applicant B. The latter instead looks at each applicant individually and whether they would be a successful student. They are now competing against the overall population of applicants instead of any other individual applicants. Considering the number of students who could be successful at a school like Yale is always going to greatly exceed the number of applicants who are admitted, the Asian student who could do the work at Yale but is rejected is not discriminated against just like the Black student who could do the work at Yale but is rejected is not discriminated against.