But it's not really about the sex for incels, it's about what having a girlfriend, or having hook ups, symbolises in our patriarchal society. It's about the power (over women) that symbolises in our sexist society. They see themselves as failures because they cannot get a girlfriend or hook up with a woman for casual sex. Removing their sex drive isn't going to eliminate that feeling of inadequacy or failure from them. In fact it could make their behaviour towards women worse, and make them feel more inadequate.