I'm right there with you overall. It comes down to "trans rights are human rights".
Since that's more than slogan, but a statement of a moral truth as well as one of solidarity, I figure it's worth throwing into the conversation :)
So, I totally agree that it is vital at this point in time to point out that being trans isn't a choice. Maybe in the future it won't be necessary, and I hope I might get to see that before I escape life, but it is definitely needed in the world as it is.
I just felt it also useful to note that body autonomy is a core human right, and should anyone make a choice to go through the process of transition for reasons other than being trans, that choice is valid and it isn't anyone's business other than the person and medical professionals involved in their process. I just didn't phrase it that way at the time