OK, this is an honest, non-snarky question, because I’ve seen other people say this on the Internet, and I truly don’t understand the nature of their objection to the term, and I would like to understand it. Are you similarly bothered by the existence of the term “heterosexual” (or to other terms that describe a more-common-than-not default state for humanity, like, I dunno, “civilian”?) If so, why; if not, what is the specific nature of your problem with “cisgender”?