True Left

"what do the gay activists think about individuals who want to overcome opposite-sex attractions for the sake of switching to same-sex attractions? If they bash them too, then they are being fair, as hence they would be against anyone being untrue to themselves."

There are a few such individuals, namely radical feminists who convert to lesbianism out of contempt for men.
https://en.wikipedia.org/wiki/Political_lesbianism

There is even a religion called Filianism which worships God the Mother in all-female congregation, and believes the existence of men is a sign of the universe decaying away from the Golden Order (their equivalent of original nobility).

IDK what LGBT activists think of these phenomena, but the relations between the LGBT movement and radfems aren't really warm.