An extended family member is transitioning in his late teens as we speak. His parents had him in counseling for years before he began hormone injections 18 months ago.
He has absolutely transformed from miserable to joyous from the medical intervention. He went from barely getting passing grades in middle school to applying for and getting a full ride to the college of his choice. He's brilliant and outgoing now instead of withdrawn and depressed.
It's been a huge adjustment for his parents, but they are supportive and loving and glad that it's turned out so well for him. They have their concerns but are so much more optimistic about his future than they were when he was a miserable kid.
For those who are unable to let people make their health decisions independently, ask yourself how this has any affect on you. Is my family member's health and happiness taking anything away from you?
I hope your relative continues to do well.
I have no objection to legal adults (I assume "late teens" means legal adult) taking cross-sex hormones or having plastic surgery, provided they are fully informed and able to consent. I would note that neither testoterone nor estrogen have been approved for gender transition purposes by the FDA or the drug companies and that all prescribing of those drugs for cross-sex purposes is off label, and that these drugs have irreversible long-term effects, including as to their safety that have not been scientifically studied to the level needed for them to be FDA approved. But if a competent adult knowing that still wants to go ahead that's up to them.
I have big objections to the same untested-for-the-purpose off-label unapproved drugs, plus puberty blockers which are also untested for cross-sex purposes and prescribed off-label, and which also have serious and irreversible long term effects, being given to children, some as young as 11 or 12, who cannot possibly fully understand the implications for their adult lives, and the same goes for surgery on underage children too.
I realise that the debate on these issues has become party political, and think that has only acted to obscure reasoned debate and draw false lines on both sides that help no-one.