For me, quiche doesn't really have a redeeming feature, it's fatty, nutritionally questionable, has the texture of mashed arthropods, and serves much the same purpose as Pizza, only it's far more difficult to make.
I know loads of people are going to say that 'quiche is healthy', but seriously, as much as we might like to think that we could enjoy a nice gooey-egg-pie full of vegetables and oily fish and vitamin supplements, I know it'd just end up being loaded with cheese and bacon.
But, from a psychological point of view, the real reason that men don't like quiche is quite simply because women do. I know it's horribly mis-representative to say that all women love quiche and no man can abide it's existence, but as the dish becomes more and more associated with the fairer sex, men will become more scathing of it. It's all tied in to Social Identity Theory. Men, who are, for the sake of an example, the 'in group', will be naturally inclined to dislike anything which is enjoyed by, or otherwise associated with women, the 'out group'. If women started enjoying fast cars, violent sports and firearms, then it is entirely likely that men would gradually cease to be interested by these things.
Again, I stress that everything I have written here is wild speculation and does not represent what would actually happen. In addition to which, the traditional roles of the genders in western culture are unlikely to change in the way I have described for a very, very, very long time.