It's the same reason Yarvin can't run a technical organization -- not because he's not technically competent (he isn't, but that's a different conversation), but because he can't help himself from flaunting his violent racism and undermining whatever it is that he's involved in. If he could manage to turn off his bigotry faucet, maybe he could be trusted to run an actual project. Probably not.
Don't blame an increasingly inclusive and considerate culture for the continued incompetence of a bigoted few. It's not hard to do good technical work, but apparently it's quite difficult for these particular white men to manage without funding/advocating/practicing bigotry and sexism. That's on them, and every time you feel oppressed by "political correctness" a dozen or more people are feeling like they can participate safely for the first time.