Being blind is bad and we should not shun people who are blind but we shouldn't act like it is wonderful and normal. People who are transgendered should be treated with decency and respect but we should not reorder society to accommodate them and we should not pretend it isn't a sever personality disorder. The military isn't a social experiment and we shouldn't modify and weaken to accommodate them, of course we should weaken the military to allow women in combat either but that is a different argument.
Let them pee wherever they want to pee but you child doesn't get to compete against the girls simply because he feels like one. The recent Texas state female wrestling champ was a on heavy steroids that gave him a gross disadvantage over the girls he was wrestling. Sorry but the rest of the world doesn't have simply because your problem is the most popular one of the time.