Orientation is not a choice.
Gender is.
Figure that out.
It is however a symptom of a serious mental disease IF that person feels "oriented" towards the same sex.
Gender is.
Why are we talking about hardware here.
People do not have genders, they have sexes. And there are exactly two of them. Male and female. With extremely rare exceptions this covers all of humanity. You either have XX chromosomes and are a woman or you have XY chromosomes and are a man. All other cases are birth defects which should not affect public affairs in any way.
Figure that out.
It's as easy as checking in your drawers. (with very very rare exceptions) If you have an "innie", you are a woman. If you have an "outie" you are a man. Piece of cake.
Is being heterosexual a choice?