The answer is in the official ideology of diversity

John McWhorter:

I recall two Black applicants we admitted who, in retrospect, puzzle me a bit. One had, like me, grown up middle-class rather than disadvantaged in any salient way. The other, also relatively well-off, had grown up in a different country, entirely separate from the Black American experience. Neither of them expressed interest in studying a race-related subject, and neither went on to do so. I had a hard time detecting how either of them would teach a meaningful lesson in diversity to their peers in the graduate program….