Johns Hopkins discontinued sex-change operations, I believe, decades ago. After having pioneered the procedure, their follow-up studies revealed that gender-dysphoric people who had the operation were more likely to have bad outcomes, than similarly-dysphoric control groups who didn't undergo surgery. The bad outcomes included depression, aggravated psychotic tendenies, self-harming behavior, and suicide.
Doctors who castrate, perform FGM, or otherwise maim patients as a treatment for emotional dissatisfaction, ought to be charged with something like aggravated battery. At the very least, they should lose their medical licenses.