Whilst I appreciate with young people it's different. Indeed it is.
When adults transition, they have developed sexual maturity, they have sexual desire, their body is capable of sex and probably fertile. Their brains have finished developing from a child to an adult. Their bones have completed the period of laying down extra bone that happens in puberty.
When a child transitions, if they start taking blockers at the start of puberty, then their bodies and minds may never develop adult sexual function (see Jazz Jennings, for example). Is passing privilege REALLY worth risking trading a functional sex life as an adult for?
Child transitioners also risk brittle bones, infertility (or sterility) and no one knows the long term effect of blockers on the brain as there have been no large studies, but what little evidence there is suggests a possible limitation in brain function (a small study on sheep).
Are you aware, also that transitioners of all ages risk heart issues? Plus stroke and blot clots if MTF? And the risk gets larger the longer you take hormones for, so almost certainly a greater risk if you start young.
Are children and young people really aware of these risks? Or, do they perhaps have older people they trust telling them transition is no big deal, really?