It’s the same reason wokeness has become used as almost a slur. Being aware of social injustices is great when it’s based in reason. The reasoning falls apart when I am legally being forced to pretend something is something when it’s not. The trans issue is reasonable until you get a situation where someone can change their gender day to day and I now become forced to pretend. The same idea for breasts, I’m being forced to pretend like almost all women use them as sex organs regularly. It’s hard because they are multipurpose. Would you say an unerect penis is not obscene and acceptable to be shown in public and in the presence of children? Just because it’s not being used as a sex organ in the moment doesn’t mean it doesn’t still carry some significance.