The author also makes another point. All things being equal, if a black woman is unprepared or unprofessional the consequences could be graver and more lasting. This is her viewpoint of course, but from my life experience, even as a white man, I’d have to agree with her.
What she doesn’t mention is that there are also cases where a black woman may be given more of a chance (at least initially) from affirmative action or similar programs. In companies I’ve worked, for in my own performance plan it was written that I had to identify, support and promote blacks, women, etc. The very existence of these programs is a necessary counterbalance to a systemic problem born out by statistical facts.