Where do people with XXY chromosomes pee? XYY? XXXY? XY women with androgen insensitivity and working uteruses? Intersex? Also, trans men exist, sonyoure going to have a lot of bearded dudebros who were assigned female at birth in your bathroom, I can’t imagine you’d be comfortable with that? What’s stopping a cis man from claiming to have been assigned female at birth from doing everything you claim to be afraid that trans women would do?