I Think The Reason Why Some Cis People Are So Offended By Being Called "cis" Is Because They're Entirely

I think the reason why some cis people are so offended by being called "cis" is because they're entirely unfamiliar with the idea that they might be things that they didn't deliberately choose to be, or that the way they inherently are and hadn't considered as a distinct thing may be a concept that's been named, observed and defined. They don't like to learn that there are names for them that they had not been aware of.

When you've lived all your life with a vague and lingering dread that you are somehow different from everyone around you, it's a relief to learn that there are words for what you've got going on, that there are names for people like you. That you're not somehow uniquely wrong in some way in which everyone else is right, you're just type B when the vast majority of people are type A. There are others like you, whose patterns are like yours, you are not a deviant for deviating from the "norm".

Default Settings People get strangely insulted by the mere idea that they, too, have a slot in the classification system. They'll protest this, being the biggest, most typical, and statistically most likely category isn't enough, they want to be outside of this system completely. Arguing "I'm not some type, I am normal", like being sorted into a type at all is dehumanising and insulting. They want there to only be One Type, and that everyone falling outside of it is a Miscellaneous Deviant. Being "typical" in contrast to "atypical" isn't enough, they want to be normal in contrast to abnormal.

In unrelated news, the ADHD subreddit on reddit has banned the word "neurotypical". That kind of language has been deemed as 'political', meaning that it hurts the feelings of neurotypicals and therefore should not exist.