Considering there are people who truly believe the essence of that post, I find the whole "white man is bad, knows no trouble, must feel guilty, and relinquish his spot to the less privileged even if earned" attitude cringeworthy. It's not because people of color, women, disabled people, LGBT etc. tend to get less than they deserve, that the privileged should, too. One needs to be elevated, not the other put down. I don't care who wrote what I read. I care that it entertains me. I wouldn't boycott Hitler and binge on Angelou except for content quality. Social justice is NOT to find a new group to put down, in this case, the white man. Social justice is to see everyone at a/the same level where efforts are fairly rewarded for their merit, not their maker.
And if you have to withdraw from competition in a skill not affected by your background, just so someone else has a better chance at winning, then that is simply pathetic and wrong. If everyone writes to the best of their ability, then everyone gets to pitch and market their work accordingly. I'm a white woman, and if I happen to be a better writer than the black woman who has submitted her WIP to the same publisher, then I get to take the cake and eat it loudly, and not feel a drop of guilt. And I'm also fat and have to take pills for my depression, so I'm also disadvantaged by society. Yet, if a healthy, athletic white male is a better writer, then he gets to beat me with pride, and I don't get to whine.
Seriously, rewarding disadvantage makes me sick. At a fancy rat show (for pedigree rats), this really happened: I entered 10 beautifully bred rats and won nothing. A little boy in a wheelchair enters what he could've fished from the sewers and wins a trophy and gets printed all over the rat club magazine. What. The. Fuck. This is NOT fair competition. What you breed or what you write, should be rewarded or rejected for its quality, not for your hardship. Everyone has hardship. Even white people. And no one's hardship should be either a dealbreaker or a VIP pass.
Also, I ain't sharing the pie with those who didn't earn it. If I got published and a socially disadvantaged person didn't and it's clear that this is solely due to content quality, then I will eat my pie and if they complain, I'll smash the empty plate over their skull. Earn your own damn pie. Most white male writers did fairly earn theirs, so why share instead of having the pie-less party earn theirs the same way? Earning something and then having to share it with those who didn't earn it lest you be guilt-tripped, isn't justice, it's coerced charity. Which isn't really charity.