Wrong on all counts.
I see what's going on here: You're one of those people who thinks that the deconstruction of gender doesn't drive a huge wedge between transsexual people and other types of transgender people, as well as us and cis people. That there's absolutely no difference between us, when it's clear on so many levels that there is.
You're one of those people that wants to squander away the gains that transsexual people have achieved in order to whine and complain about pronouns and tell cis people that gender is broken for everyone when it isn't.
There's room for everyone. But when you erase a terminology, you erase the people who use that terminology. And leaders of the trans community knew exactly what they were doing when they did this.
You don't get to erase people.