"The word has its origin in the Latin-derived prefix cis, meaning "to/this the near side" as in the cis-trans distinction in chemistry, or in the ancient Roman term "Cisalpine Gaul", i.e., "Gaul on this side of the Alps". In the case of gender, however, "cis" refers to the alignment of gender identity with assigned gender." wikipedia

So its not something some "gender studies nerd" pulled out of his or her ass. This is how words get made this is how we assign meaning to them.
It doesn't do us any good to ask each individual how he or she "feels" about a particular word. No one cares how you "feel" about the word "room" we all agree that it means an enclosed space. The "room" could be a banquet hall or a walk in closet so there is a lot of ambiguity to the word room until other words are added to the sentence to clarify and further define the meaning. Context maters as well. If I walk into a motel office and ask for a "room" there need not be a discussion about what kind of room I want beyond wether said room has a king or 2 queens.