any major decisions about psychological health are difficult at such a young age, especially prior to schooling experience, which plays a pretty major role in early development. someone else's treatment is the business of them and their doctor, but it's definitely taking a risk.
also there isn't any information about this patient's treatment that i can find, but nothing seems to be saying that they're specifically planning on doing reassignment surgery. all i can find is that they're beginning their transition to their preferred identity.