well, URM is defined by a very narrow criteria based only on race and I am pretty sure you can't argue out of that one. JUST race gives advantage in admissions.
I think there outta be more physicians serving underserved populations, and I admit it's not very likely for someone like me, who grew up in a middle class suburb, to want to go serve the inner city, where I've never lived in my life
I do have a problem with upper middle class black students getting a boost in admissions over upper middle class white students JUST because of race, because we all know darn well that one isn't going to be more likely to go serve the underserved population than the other.
people are mostly defined by where they are from, where they grew up and socioeconomic status, race as a criteria for admission is fauculty because it places race in a vacuum, without considering anything else.