It appears that a physician who put himself through school because his family was without means to help is lucky because he had the brains and drive to make good grades. After getting his MD he chooses to focus on finding a cure for cancer and discovers protocols that inhibit cancer cell growth. When asked what drives him he says he lost his sister to cancer when he was a child and since that day he has wanted to be a doctor? So was he lucky to have had a sister w cancer?
Sometimes privilege and luck are not mutually exclusive. He certainly was privileged to find his calling at a young age and I would guess there was a fair amount of luck in there as well (getting into the school that nurtured his passion etc) but you cannot discount the power of personal drive either.
I really dislike the language of privilege in this context. I'm not sure what point it serves other to diminish someone else. Some people are smart. That's as much a part of them as their skin color or sexual identity. Should they feel apologetic about that?
Also, as a counterpoint, I know brilliant people who wasted that talent on drugs and other things.