In opposition to your post, the problem is creating a priveleged applicant class (AA=lower stats, in general) DOES create a quota system, no matter what you label it, based on skin color.
And BTW, what constitutes black for example? Must one be 100% african american or is 51% OK (if your pigment is dark)? What about 10%? Where do you draw the line? From what I have found, this is a self-declared and self-policing status. There is no verification or authentification whatsoever.
Only socioeconomic, educational opportunity history, etc. should be considered. Not pigment.
The fallacy of this whole BS system is that lower stat matriculants can and do progress and graduate medical school, irregardless of race and ethnicity. This includes passing boards. The issue is the non-URM with equal hardships was not considered, even though his stat's were equal. The problem was pigment. He too could have had overcome the obstacles and became a doc, given the opportunity. So this whole concept of MCAT+GPA=X being a predictor is true, but less critical than the system would have us believe.
Bottom line = discrimination based on skin color is wrong, no matter which way the pendulum swings.
Hell, discrimination exists due to many factors: wealth, looks, weight, gender, hair loss, and so on. When will we start boosting stats b/c of those factors? Why should a privileged person of color have more opportunities than a poor white kid. All we do is give a whole sector of the public a crutch for life. While meant as an aid, it only becomes a crippling appendage. That is why socialism and communism failed.