Personally, I feel that the stage kids go through where they run around violently exploding things is just more scatalogical humor along the trajectory first defined by "peepee" and "poopie" and migrating towards belching, armpit sounds, inventive expressions for various body parts, leading up to sexuality and violence. In the same sense that everyone appreciates an adult who no longer thinks farting is hilarious, the expectation is that sophisticated men move past the concept that blowing things up is fun.
But then what is that obsession all about? All these other things are physiological urges, the lack of control of which creates a sense of humor about it. When kids are young, they think that "beating up the bad guy" is the way to be protective. However as we age we realize there are all kinds of ways to protect one's society and family.
The Entertainment industry as a whole, like any industry, goes where the money is. Hollywood has become sophisticated enough to have found markets for intellectually compelling stories, social commentary, romance, and adaptations of classic literature. Is the game industry starting to break out of its constraints with A Force More Powerful, based on a TV series discussing successful campaigns of non-violent social change?