> Common courtesy seems like a nice thing to do? If cis people don’t want to be called “cis” then we should use the label they prefer?

That is completely fair! My next question is: what proportion of cis people are offended by the word? I personally couldn't care less, and I can't think of anyone around me who cares more than me. I'm all for common courtesy, but it has to be based on something. "I don't like being called cisgenre and therefore I can conclude that all cisgenre dislike it too" seems a bit wrong to me.