Words exist in context. If I called my female boss a bitch because I perceived her as domineering or demanding, that'd be out of line. If I call someone a dumb bitch for running one of the most toxic accounts on social media posting nonsensical disinformation, that's very different. While I understand that being called a bitch can be very hurtful, I'm not calling you one, I'm calling someone else one, so being offended on their behalf is silly. I'm not gonna censor myself because someone might have a negative association with a word. And before someone says "I've heard the same logic applied to the n word" cool well I'm not applying it to the n word, I already don't say that so I don't need to censor myself.

Etymologically speaking bitch refers only to women, but in modern usage the pejorative is used for both genders

Not the women who aren't bitches, since it's not directed at them.