I'd say that the common factor is more likely to be "risking a death but surviving, while the enemies suffer horrible deaths". Look at the traditional fairytales that play such an important role in our formative process, for example. Children love it when the hero is in danger, even though they've heard the story a hundred times before and know the hero will survive, and they lap it up when the giant or wolf or witch is disembowelled, eaten, burned alive or whatever.