The harm
I mean, the harm is obviously the potential for parents who don't want their kids to be trans or who don't believe that "trans" is a thing their child can be... having their kids taken away by the state.
Hym "That's the harm. Not to mention the side effects of the treatment. You hear the new Jordan Peterson trans rhetoric? Girl's can't be trans! It's a men's issue. They don't care about the little boys doing it. They need to keep that fresh pussy pure for their incest breeding cult."