Think of it from the point of view from admissions. Medical school admissions wants a strong class, not necessarily a class consisting of 32/3.8s, because they won't be able to draw on certain experiences. Medicine, like pretty much everything else in life, is about teamwork, and teamwork thrives when the team is diverse, so members can draw off more experiences and situations they've had in life to solve a problem. If every medical student story started with "One time I was studying Orgo in the library..." we'd have a very weak community.
Yes, diversity can be comprised of more than race, but somethings can't. Do you think a class of 80% white, 15% Asian, and 5% Indian isn't racist? Get a grip.
The downsides to this are that disadvantaged non-URMs go overlooked because of their race. But in my experience, admissions tend to look at the whole applicant, and disadvantaged people will be looked upon favorably.
And I can't believe I have to say this for it to have the same effect, but I'm white.
Accepted! D.O. 2017