Well, you can say what you wish but you were wrong.  Conversion therapy refers to trying to "cure" homosexuality and it is a pseudoscience.  Gender reassignment therapy/surgery is not.  The only real controversial part of it in medicine and science is what to do with children and the practice of hormone blocking, and there is actually open discourse on this very topic.

There is no real controversy with consenting adults.  You can not like it, but your views should not have a negative impact on those for whom this is a very real life issue to deal with.