Where did I say they didn’t?
If girls have more of a right to safety and dignity than boys, then boys have less of a right to safety and dignity than girls.
Everyone has a right to safety and dignity. Everyone.
Where it gets tricky is that girls and women are conditioned—for centuries! to fear or at least be suspicious of male appearing bodies, especially in intimate spaces. One of the biggest ways girls and women are/have been so conditioned is through rape, threat of rape, enforced virginity which, if lost, makes you fair game for rape, forced pregnancy and huge amounts of slut shaming. This is an ugly ugly ugly truth designed to cover up the fact that rape is an act of violence and not of lust. This is true no matter who the victim and who the perpetrator. Also to control women and to ensure they don’t ’get out of line.’
That conditioning is the reason that most of the women who object to ( pre-surgical) trans women in women’s restrooms and locker rooms. Of course some are just bigots but the absolute fact is that the unexpected appearance of a naked body in a space where you expect to see only persons whose bodies look like your sex/gender will provoke a fear and/or anger response especially if you have been the victim of sexual assault.