I'm not comfortable wearing a t-shirt that says "feminist." Or other variations like "the sisterhood" or "love your tribe" or "the force is female" or "the future is female." No thanks.
I'm uncomfortable with the notion that there is some sort of genuine sisterhood among ALL individual women. Some of the most egregious acts of cruelty I've experienced have been by individual women. Many women DON'T help women. Women shame. Women gossip. Women sabotage. Women envy. Women take down. So do men. Not all, but many. That's because women and men are human. And many humans (not all) don't help humans (including myself at times).
I'm also uncomfortable with "the sisterhood" because as Roxane Gay points out in her book BAD FEMINIST, race remains a big problem within some feminist circles.
The future isn't female.
The future is.