I actually don't think that's true. Being in a relationship and having kids lowers your testosterone and turns you into a beta male. Some people may call this a cope but I actually think a lot of incels are masculine. Being a social butterfly is what women want from men, they actually don't like masculine men who speak very little which is what a lot of incels are.
Women would rather be in a relationship with a beta male social butterfly soyboy, because he is easier to control. Basically they want a handsome pretty boy who they can control. Incels are usually the complete opposite of this, because we are ugly and we don't cater and pander to women.