Being gay is not a mental disorder, but gender dysphoria (just like body dysphoria) is, and should be medicated and treated responsibly instead of making it the new norm and not providing people with the mental care they need.
Please don't create accounts to break HN's rules with.
I'm sure you were trying to be offensive here (no surprise here, coming from a throwaway account) but apart from it not being called that anymore (DSM-5 calls it "Gender Incongruence" now) and it not being a disorder (again, see DSM), you are mostly correct. It should be treated by medication (HRT) and social transition, and of course appropriate therapy should be provided.