Ok, I might regret this...
I'm in agreement with you
The Gnome about biological sex being binary with there also being a small subset of intersex, and it being impossible to 'change your sex', but not your gender or the way you present that to the world.
But why does this lead you down a path to be so incensed about 'the truth' on this subject in particular? People deny and dispute facts and the reality of situations all the time, even in pretty undisputed arenas, so what is the
actual issue that so concerns you on this topic? Why would you make this the priority political topic above others?