The problem is that it boils down to not wanting trans kids to exist. You have a trans boy, presenting as male, blocked from the boys locker-room.

Care to guess what would have happened if they tried to use the girls locker room as all the righties are demanding?

Say you’re in the womens restroom and Buck Angel walks in because he’s legally blocked from using the mens room, imagine the reaction.

It’s not about which bathroom is the "right’ bathroom. They don’t want trans people to have the human right to use ANY bathroom.

The cruelty is the point.