To be clear,(It seems that this may not be an accurate paraphrase –?gung couldn't find it, and Monica doesn't remember using the word "nausea," but didn't dispute the general sentiment.) I also believe that Monica has said she's willing to use gender-neutral neopronouns like "xe"/"xer", just not "they"/"them". (And she doesn't remember using the word "nausea," but didn't dispute the general sentiment.)
Singular "they" is really not that big a deal;. In general it has a very long history, and even for the relatively newer usage as someone's only pronoun, it's just a really small ask. (It's probably about as novel as that usage of "ask" just was.) As linguist Geoff Nunberg says in an article called "Even A Grammar Geezer Like Me Can Get Used To Gender Neutral Pronouns",