The long term equal performance thing is less clearly demonstrated, justice scalia for example had a very strong belief otherwise. Here's a perspective on it from the no difference side (i'm sure you'll have already read the other versions of the argument): https://www.washingtonpost.com/news/grade-point/wp/2015/12/1...
I'm more convinced by the need for black doctors than the performance argument personally. If having a black doctor for a black community leads to better health outcomes because people trust doctors that look like them (with good reason, unfortunately, things like the Tuskegee syphilis experiment have not been forgotten), then medical outcomes are medical outcomes. If their race, in that case, makes them a better doctor for that community and that community needs more doctors to address large health disparities, then that in and of itself is a type of performance metric that's important. I don't like that that's the case. I'm obviously biased since i'm asian and I'd very much like higher admit rates. And I'm idealistic in thinking race shouldn't matter in administering medicine. But that's not the world we live in yet. And it's not just from the patient perspective, a different sort of cultural understanding and empathy from the doctor also helps them practice, which their race or gender can provide.
>And it's not just from the patient perspective, a different sort of cultural understanding and empathy from the doctor also helps them practice, which their race or gender can provide.
this is the biggest factor i think personally (though i'm not a doctor) - i imagine it's very hard to treat people effectively if you're not intimately familiar with their circumstances.