Gender is a grammatical category. If you use it to describe living things, you’ve conceded to their terms of discourse, and have already lost the debate.
Well, you might think that, and they might think that; but I don’t think that.
Unless they can pour gender into a glass; it’s not fluid. It’s male or female.
Think about all the Latin based languages that use gender as part of their base language such as Latina vs Latino. What is a “cisgender” person going to say when they are referred to as one of those two basic words in the Spanish language?
All this gender fluid crap needs to go away. It’s the end result of feminism and emasculation. Neither being any good for the long-term health of the human species.