You're making quite a few cardinal mistakes here. Your first assumption is simply not the case, and is one of the fundamental problems with any trial of puberty blockers. It is not possible to identify the small subset of adolescents who want puberty blockers as juveniles, and who would still want to transition if they were allowed to go through puberty uninterrupted. There is no screening process proposed to identify such individuals, because no such screen exists.
It should not be controversial to accept that the best possible outcome for a gender-confused young person would be to become comfortable with their own unmutilated body and grow up into an adult who will not be a permanent medical/surgical patient and who is not at risk from any undesirable side-effects of having their puberty blocked and taking wrong-sex hormones. Around 80% of the children recruited into this study would have that outcome if they were not so recruited. However, it's known that the use of puberty blockers turns this 80% into pretty much 0%. Puberty blockers actually prevent the process that allows the young person to become comfortable with the body they actually have, and locks them into a trans identity and on to the path of wrong-sex hormones and mutilating surgery. Consider that first.
So this idea of simply using puberty blockers to delay puberty and then allow it to proceed later doesn't work. This was the original sales pitch, but it doesn't happen. Put these children on puberty blockers and the damage is done. They don't come off them and let normal puberty proceed. They are on the railway. What actually happens is that they become more anxious about puberty and more averse to it, also socially isolated as their peers all grow up around them and go through the physical and mental changes normal for their age, leaving the puberty-blocked frozen in children's bodies and childish minds. Then they grab the offer of wrong-sex hormones as the solution to all their problems.
That on its own should be an absolute block to this experiment. Before you even start, you know that you're preventing 80% of your subjects from having the best possible outcome. The supposed benefits, if they even exist, would only apply to the remaining 20%.
The proposed study has no intention of giving any of these children psychological therapy in the hope that they might decide to come off the blockers and let normal puberty progress. Everyone in the study has been promised blockers. Half will get them right away, and the other half will be forced to wait a year. That's all. The ones waiting a year aren't going to be persuaded they don't want them at all, they're simply going to be resentful and impatient and counting the weeks till they get to have them. It's simply a study to see whether a year's delay makes any difference.
I also wouldn't be too keen to talk to the people who had puberty blockers for precocious puberty, or the same drugs for breast cancer and other diseases, and tell them these drugs "aren't terrible". Many of them beg to differ.
You talk as if there is no serious down-side to this trial. Even leaving aside the incontrovertible fact that 80% of the participants will end up going through a transition they would have avoided if they had simply been left alone, there is strong evidence of significant adverse effects, from loss of adult bone density to loss of IQ points and cognitive deficiencies.
The idea that human experimentation, on children, should be given the green light in this context is terrifying. The limited animal studies are a huge red flag that this is far from a benign intervention, and it ought to be unthinkable that these drugs are given to physically healthy children without a comprehensive series of animal experiments to show that they are in fact acceptably safe. The other issue is the follow-up data on the thousands of young people who already went through the Tavistock. Again, it should be unthinkable that even more children should be fed into this meat-grinder without taking into account the outcomes of the thousands who went before.
"Some evidence" might be a good thing if we could be reasonably confident that children wouldn't be hurt in the attempt to acquire it. But we have no such confidence.
Planigale, you're remarkably keen to press ahead with this desperately flawed study, rather than step back and go through the normal preliminaries to human trials that would precede any human trial on anything else. Why so desperate for this, rather than proper animal studies and a detailed analysis of the outcomes of the existing patients - who were after all enrolled on a trial too?
But then, your persistent ignoring of the last half-dozen times I said the same things, constantly clinging to the fallacy that puberty blockers are harmless and reversible, and constantly rejecting the acquisition of basic safety data from animal tests, and the use of trans-activist language like "cis puberty" God help us, rather reveals where you're coming from on this.
The very best thing that can happen to these children is that they should be supported to go through the natural puberty that is their birthright, at the time their bodies initiate it. That they should be reassured that this natural process is not a disaster, on the contrary it is the process that will lead to their minds maturing and coming to terms with growing up. Why are you so opposed to this? Why do you frame this natural and beneficial process in such negative terms?