So I guess we're back to the old system except turbocharged by the internet: a lot of teens will suffer inexpressible body horror while feeling helpless and knowing their agency has been taken away by adults, great plan, nothing can go wrong there. And then some of them will run into the arms of the kinds of adults willing to offer access to HRT and who will knowingly risk a kidnapping charge to shelter a teen who can't hide the changes anymore. There's your fucking safeguarding concern.