I seem to recall when being gay reached the Tipping Point and suddenly the news was filled with stories of people coming out the was a reactionary movement saying that the newly-out were just looking for attention or trying to be fashionable. Now that transgenderism is gaining traction this just seems to be history replaying. Why not accept a person's own description of their feelings are being more informed than your own? You may know how you feel, but you can't tell others what they feel. Why not trust that parents are acting in good faith and in the best interest of their own children?
Yes, some kids and some parents may briefly go down a wrong path, but it's pretty likely they'll discover that on their own. In the mean time other kids and other parents have a new path open that hadn't been there before -- all of us old folk know what happens when that path is closed; we're on here complaining about it. A Lot.