When you start giving someone hormones, start performing surgery, you create situations where you can't go back, you can't get a do-over.
Surgery and drug treatments should be the LAST resort, only done if therapy and acceptance refuse to take hold with the person.
It's the fault of advocates pushing for early medical level treatment.
Let them dress and act the sex they want to, let them get mental treatment to try to get them to accept their sex, then after they are 18 and if all other options don't work, let them explore surgical and chemical solutions to their issue.
I have to dispute that those are ever valid options.
As a matter of undeniable, immutable scientific fact, it is biologically impossible for a male human to become female, or for a female human to become male, no matter what bizarre quasi-medical Frankensteinery is done to them. I maintain that it is nothing less than fraud and malpractice to ever perform such procedures, and to represent that they do change the patient's sex; and that it is not ever a valid treatment for any delusional mental illness to validate the patients delusions, to treat them as reality, and least of all, to perform destructive quasi-medical procedures in order to reinforce these delusions.