Defuse this confusion: say “SEX” instead of “gender”.
Verbs and nouns are characterized “gender” which have “neutral” forms.
People are characterized by “sex” which have no neutral or deviant forms..
Verbs and nouns may be characterized as masculine and feminine. Males can also be characterized as masculine or feminine, as can females. But that doesn’t change their gender.
Try to tell a “transgender” person (or a liberal) that “sex is binary” and you will get the same reaction as trying to limit their gender. Again, look up gender in a pre-1990’s dictionary, before academics started redefining gender as a social/grammar construct.