I think what raindog is saying, if I may be so bold, is that if a black kid and a white kid both go to school every day, do well on the SATs, get good grades, head to college, continue to work hard and score well on tests, both do well on the MCATs and head to medical school (where they continue to work hard), then both can end up as successful doctors. There was nothing directly about their race that kept them from getting into college, medical school or a hospital anymore.
But, I’m guessing that raindog would also agree that a history of institutional racism in this country where there certainly was something about the black kid’s grandfather’s race that kept him out of medical school (as well as individual racism) has set the stage such that it is less likely that that hypothetical black kid than that hypothetical white kid has family members or friends who went to medical school. Or even went to college. Based on that history of racism, the socioeconomics are set that it is less likely that he could afford SAT prep courses or MCAT prep courses that would put him in a position to perform as well on those exams.
There is nothing in the institutions (college, medical school, hospital) stopping that kid from succeeding, but that is not denying that it is probably something more of an accomplishment if he does succeed because he (statistically) likely has more hurdles to jump to get there.
May I be so bold?