I think transgender people are rare enough that it wouldn’t make a big difference in practice to most .
If the mere act of expressing that you want a different gender than the one you have changes your gender for societal purposes you are going to have a lot more “transgender” people when there are benefits to be gained.
If the mere act of expressing that you want a different gender than the one you have changes your gender for societal purposes you are going to have a lot more “transgender” people when there are benefits to be gained.