So by your argument we should act as if people with e.g. Dissociative identity disorder, are completely healthy, just because they "identify" as somebody, and we should not judge their identity ?

What about clinical cases of people who identify as Hitler ? Should we label that healthy in the name of progression ?

I'm sorry but I cannot be convinced that a condition where you want to mutilate your sexual organs and change through surgeries (to whatever) is healthy and normal.

It's also highly questionable whether it's even a stable identity. In dementia health care, there are many reports of transsexuals forgetting their opposite-sex gender identity, and becoming shocked and horrified at what has been done to their bodies. Perhaps gender identity is not as innate as activists would like us to believe.