Sorry, but that's hogwash.
The impediments that dark-skinned men and women have to overcome economically and socially to gain any sort of power in this culture are far greater than those of light-skinned people. And this mantra of "personal responsibility" is just society's way of blaming the victims. We build a wall so high that only a very few people of color can manage to scale it and then we use the fact that a few do manage to scale it as an excuse for ignoring the wall we've created to keep most of them pushed to the furthest margins of society. And then we use that marginalization as an excuse to blame them for not wanting to "fit into" mainstream society.
Then we blame them when they get angry about all of this. Or when they become hopeless. Because nothing is ever "whitey's" fault. Nothing is ever "whitey's" responsibility. Even though "whitey" controls all the levers of power, and of wealth, and of cultural expression in this society.
I think your statement is hogwash.
I don't think those that are successful and accomplished should have to "hold off" or stop pushing for excellence until the rest can catch up with them just so things will appear more equal.