Can you be a bit more specific? What is sterile about describing a person in opprobrious terms without using the word "bitch?"
What realms of human experience and observation are we ignoring? I suggest the opposite: Slurs like "bitch" are lazy, they ignore the myriad of subtle colours and shades of human behavior and replace them with a catch-all that means roughly "we disapprove of you."
I am certain that a man can damn his ex with far more wounding intent by expanding his vocabulary and unleashing his inner poet. Such insults would hardly be sterile, they would be fecund.
First of all I want to make it clear that I'm not defending Noah's use of that slide - I think it was dumb. I don't think that you think I approve of it, but I just wanted to get that out of the way up front. For the sake of argument though I'll be operating under the assumption that denigrating an ex- in a slide is a good idea, and the issue is to choose the correct word.
Back on topic, the ideology I was thinking of is the idea that men and women aren't statistically different (or if they are, that mentioning such things is impolite). I would argue that "bitch" captures a characteristically female way of hurting a man with whom she's had a relationship. (See Carmen for the high-culture version, or Louis CK for the pop-culture version - http://www.youtube.com/watch?v=ZpW3orlfp7E) It's true that the word also carries other connotations, but I don't think that was the intent.
I agree that it may be "lazy", but from a purely practical perspective, it would be tough to find a similarly short word (short enough to fit on the bobble-head) that conveys the meaning. "Evil" might work and is gender-neutral, but the class of actions that make one "evil" are broader than the class that make one a "bitch".
There should always be a divide between public life and private life. It's called professionalism. Unless your profession revolves around peoples private lives you should avoid the 'realms of human experience' and focus on 'experiences related to you getting money/work done'. There is a time and a place, and knowing this is an important part of being an adult and fitting into society.
