I'm gonna sound like a nazi, but I'm curious, why? (I know, what a hypocrite) I mean it sounds like it would not only make seriously retarded kids easier to take care of, but also prevent intensely autistic adults from being able to significantly hurt their caretakers. The appendectomy, hysterectomy, and breast removal is sketchy but the growth stunting is... I can see a reason why it could be beneficial.
Let me preface this by saying that I did not read all too much about Ashley X, so if I'm wrong about anything I'm about to say, please correct me.
First of all, the procedure wasn't just done to make the kid "easier to handle", so to say, but also because it was considered to be in the best interest of the child. Her appendix was taken because 5% of the population will have issues with it eventually, but since Ashley is nonverbal, she would not be able to vocalize symptoms. Although she is profoundly disabled and can't even lift her head or grab objects, she is still conscious enough to feel pain. According to the parents, her breasts got in the way when she had to be strapped into a wheelchair and caused discomfort, and well... Periods are also painful and all the blood is kind of a hygiene issue for a diapered child. The parents also argue that the lack of sex organs will prevent pregnancy and make her less likely to be raped (which I don't really understand; if you're messed up enough to fuck a vegetable, I doubt you'd have very high standards when it comes to their cup size), and say that due to her low height and weight, they will be able to care for her even as they get older, and won't have to ship her off to a potato farm (which I think is admirable and shows that they didn't choose the procedure because they wanted to make things as easy as possible for them). The parents considered the procedure to be a success and I haven't really read anything about any side effects. Then again, I guess lower bone density and a higher risk of depression won't affect you as much when you're barely conscious and immobile.
People who are against the procedure always seem to argue that the procedure is a violation of Ashley's human rights, because it's not really necessary for her survival and left her "mutilated". I even read the term "desexualization" being thrown around, because I guess some people find it normal to think of an almost-potato as a sexual being. Barf.
Maybe I'm even more of a nazi than you, but I don't really see the issue. The operations in itself are obviously also risky and painful, and so is the hormone treatment, but from how her case has been described, her quality of life really seems to have improved from it. Ashley has no concept of bodily integrity, she's not going to mourn the loss of her F cup tiddies uwu or her supposed desexualization. She does not understand sex, or pregnancy, nor will she ever want children and become depressed due to her infertility. Again, this is someone who can't even grab a pencil. Even babies can do that.
I wouldn't do something like that to autistic children though. These guys have meltdowns all the time and would probably grind their bones into dust due to the hormone treatment.
And of course there is absolutely no comparison with children like Jazz. Jazz may be immature as heck, but they are at least aware of their existence. They could theoretically enjoy other things outside of trooning out and sperging about gender that could be taken away from them by the treatment. First and foremost, they are able to move around consciously, which is an issue when you have brittle bones. Maybe they find themselves enjoying sports, but are unable to pursue that hobby due to their health issues. Or maybe they attempt it anyways, only to permanently cripple themselves after a serious injury. Or maybe it's not even that. Maybe they slip in the bath or trip on the stairs and completely wreck themselves.
Maybe they'll eventually crave freedom and independence, just like Jazz clearly does. You know what would really come in handy in that situation? Having a brain that has matured into that of an adult.
Or maybe they even want to reproduce. That is sort of a big deal to us humans, although you probably don't really care that much at age 13. At age 13 you just want to fit in and be cool, and right now there is nothing that gets you more attention than being "progressive" and trans. Even just being gay is not woke enough anymore. But maybe once you've lived for another decade, you come to the conclusion that asspats from strangers are not worth it and you'd like to start a family. Too bad people sterilized you for something you said as a child. Or maybe you only want to not feel so alone anymore, but nobody wants to date an immature dickless sexless being.
Oh, and even just avoiding depression would be worth it. Depression fucking sucks.
Tl;dr: If your quality of life is near zero anyways (Ashley), then an invasive procedure such as blocking puberty might actually have its advantages.
If you're a healthy teen having a tough time going through puberty, it's not really worth fucking up nearly all aspects of your life for cosmetic reasons. It's current year, if it makes you happy then wear dresses and paint your nails pink. Who gives a fuck. If you genuinely are trans, then passing slightly less but having a matured brain and sexual organs seems like the way smarter choice.
I don't know which kiwi said it, but hardly anybody has a body they are 100% satisfied with. Even some people born with a really crooked nose or huge port wine stains may experience severe distress because of their "defects". Most of us just learn to "get over it" and enjoy life regardless. Doesn't really matter when you transition, it is absolutely impossible to become a 100% convincing man/woman, so if the thought of having an "imperfect" male/female body distresses you, you will still be distressed after surgery.