You know, if you don't take words personally, they lose any of their potentially poisonous meaning. Suddenly, they're just any other word.
Words are a mechanism of communication. They have no inherent meaning, only that which we as interacting humans give them in order to enable communication of ideas.
Take racial slurs--regardless of their original meanings, whether those were actually malicious or mere abbreviations or nicknames, they acquired negative connotations, and if you use them it will be assumed that you intend to communicate those negative connotations.
So, too, with words like "bitch." It might be that in general, when you use that word, you're in an environment where the negative bits are ignored, and you are able to communicate what you really mean by it without misunderstanding. But there are many places where you do communicate the negative bits, even if that was not your intent.
The mods have decided to simply excise the word wholesale, as part of a broader effort to allow those who would receive negative communication from it to feel safer and more welcome. I'm not sure I entirely agree with the decision--I'd prefer them to use a bit more discretion--but I can understand why they made it.
Words only have the power that we give them. That doesn't make them empty pointers to simple and sharply defined concepts.