The casual, gratuitous, ubiquitous violence in video games doesn't have to directly cause real world violence, or desensitize players to it, for it to be worthy of some amount of criticism. Video Games are an artistic medium, there's a lot more to human experience that they can explore. this is less a criticism of the game creators and more one of the gaming audience that seems to want to be sold the same experience over and over rather than experience anything new.