You missed something important. If the default position is to “always believe the accuser,” which is a central theme of #metoo, then that adds another layer to responsible safe sex practices for men.
Men prior to #metoo must practice birth control, get STD tested, and be sure that their partners are also STD tested, to ensure the sex doesn’t have permanent bad ramifications. Post #metoo, men must also be absolutely sure that their partner will not lay a false accusation against them, due to malice or to a benign miscommunication, because the default has changed to “accuser is always right.”
In short, men must vet their partners more carefully. And one of the greatest indicators of the possibility that a partner might lay a false accusation against them, is if that partner identifies as a modern feminist.
I say that as someone who used to identify as a feminist. Sex with feminists is simply not worth the risk, while “believe all accusers" remains the standard among feminists. It’s not safe.