American society already legislates the moral choices minors can make, and have been doing it for decades:
1. The age they can legally purchase and consume alcohol.
2. The age they can legally have sex with another individual.
3. The age they can legally drive a car.
4. The age they can legally purchase tobacco products.
5. The age they can legally work for pay outside of the home.
6. The age they can join the military.
This list goes on.
Again, I'm talking about minors here. If a legal adult want to waste their time and money, along with most likely a lifetime of pain and suffering, to become a different gender, then they can knock themselves out.
So you are in agreement that all the above laws should be repealed, in the name of getting government out of the morality business?