I guess I don't see why having a bunch of Asian/White doctors with a handful of all the other races mixed in adds anything to patient care or development of new treatments.
As a patient, I don't care if my doctor is black, white, yellow, purple, or whatever, I just want to know that they are the most qualified person I can see within a reasonable time frame. I know undergrad GPA/MCAT have almost nothing to do with how competent of a physician someone can or will be, but if it's the standard ADCOMs are using, then everyone (all races) should be treated equally.
Also, though this is an incredibly stupid analogy, it is one I have used and thought about in the past. Say the average NBA guard is 6'2" 220lbs. Anyone who has watched an NBA game knows the vast majority of the players are african american with some caucasians and very few asians. If a 5'8" 150lb asian with more basketball experience, knowledge, and heart were to tryout for an NBA team, he wouldn't even be given a chance because his stats (height/weight) are not good enough.