Note that when I think of psychological disorders, I don’t think that it has any bearing on how valuable or fundamentally good a person is. Some people seem to get really wound up about the idea that gender dysphoria could be some kind of disorder, but have no problem calling depression a mental illness (and bear no ill-will towards depressed people).
I’d hate to answer questions that you posed to someone else in their thread, but depression and transgenderism are not comparable. Depression is a chemical imbalance that lessens the quality of life significantly of the person in question. Being transgender, while often a difficult experience in most societies, is not something that in and of itself prevents someone from living a productive and happy life. I’m not transgender so I can’t speak for people that are, but homosexuality is and has been frequently slapped with the “mental disorder” label in the past and I think it’s a similar mischaracterization of the issue.