As a trans person, I’ve read your question, so I can answer truthfully, “yes, at least one trans person knows you reject ‘cisgender’.” But that leads me to ask you “am I supposed to care?”
There are many names for the set of surgeries used to address the physical dysphoria that some transgender people face. Some are problematic.
“She said she can’t play with me because I’m a boy, but I’m not. I’m a girl!” The adult laughed and told me “don’t be silly, you are a boy.”
I've been coming up against this question a lot lately. I'm not claiming to be an expert now, but I've learned a lot more, and have developed thoughts and theories to explain some of the issues we face now.