I think you're bringing up a different (very related) point than him, with both points having truth:

1. You're free to pick the race of your doctor. Matching your race is a data driven positive.

2. 30 years ago, the system made sure a minority doctor was (at least, but probably more so do to discrimination) as competent as a white doctor. These days, the system is intentionally and deliberately set up so to help pass less competent minority students, due to the positives of #1.

It's a mushy relative thing.