I believe that the attraction of violent content on TV and cinema is escapism. Again, it happens to other people, unreal people.
Ever notice that action heroes never go to the washroom?
Do you realize that the simulated violence, if real, would cripple the movie hero before the first 20 minutes of footage were through?
If TV and cinema portrayed violence in all its real scope it would be just too discusting to be marketable.
And if it was mixed with sex it would be too close to everyone's reality to be aired in public. It is no wonder that the best sex and violence viewing material comes from Japanese animation. Again, unreal.