it's because men are simple and have simple needs. games that unify all the 4 b's are quite successful. take the GTA-Series for example. is it a "good" game? i hate it. but i don't count. what counts are the sales figures.
I dont think the gta series is successful because of booze, violence, and sex. I think primarily a game like that is successful because it allows the player to do whatever they want in a virtual world. I think it is the escapism of games which gives them appeal.
For example if you made a game about going into a bar and shooting people and having sex it would not be as fun as gta because in gta you can go anywhere_you_want, which = freedom/power/escapism for the player.
Its playing god that makes people happy. Killing is just another way of playing god. If you kill an ai you have exerted full power over that ai and that makes people happy.
In a game such as gta they can do anything they want, and therefore they fulfill their fantasies.
But you are right to a certain extent, violence and sex do appeal mainly to men. A game like sims 2 appeals to a lot of women also, but for the same fundamental reasons; they like to find their utopia, their perfect world in a game.