It's been said that "white men can't jump" and that's why many great basketball players are/were people of color. Is it true?

If so is it likewise true for other sports?  In football and track ya gotta run fast. Slowpokes don't cut it. Some athletes have more natural talent than others of course. Some succeed by working VERY HARD at  it while others seem to excel effortlessly. Is it training, dedication, passion, determination that makes the difference or something else?