The etymology of "bitch" is literally "female dog used for breeding" which usually means being targeted for perceived AGAB and fertility. Like I get what you're getting at, AND in this case the slur is very much based on perception of femaleness and not just someone's identity. Imo, don’t use if: referring to any gender minority, aka no women & no trans people, since it's a gender-based slur. Also don’t use slurs?