The rare wackadoodles proposing an asexual lesbian commune are simply not who most people are talking about, when they mention feminism. Those loons can wear the label. Nobody can stop them. But they’re not relevant.
Feminism is gender egalitarianism with an archaic name. When people denounce self-proclaimed feminists who don’t agree with that, it’s not fallacious bickering, it’s active gatekeeping, and it’s fucking important. Some clear boundaries are necessary for a movement demanding systemic change. Any political label can have a complicated history, and it’s not somehow a contradiction to point to the fringe weirdos and say they were just plain wrong.