I am all for protecting kids from extreme media, as long as they still have a chance to learn and prepare for the real world, but am not convinced that video games promote violence in the aggregate. To the contrary, violence levels have fallen since games became popular, and I think games, like theater, are one way for people to learn how to deal with complex issues like violence without engaging in them.
Humans are morally intelligent beings. Well built games allow us to develop, not degrade, our moral sensitivities. Desensitization is a problem with media violence in general, but games, like books, can also teach us to be more aware and sensitive to human issues and to deal with risk, including death.
Furthermore, think how many kids have been saved from serious injuries or death because they are locked in their bedrooms playing violent video games? How many soldiers have been more prepared to survive on the battlefield because they play war related games at home?
Games can be among our most sophisticated teachers. Beyond edutainment, most games teach us that we have physical limits. Yes, in some games you can jump off a cliff without real consequences, or crash a plane, and yes you may even get more than one life/chance if you do take that unnecessary risk and fail, but just as many games teach gut wrenching consequences of risk or violence, like the most recent Tomb Raider reboot.
There are also game experiences that teach us how to get along, to cooperate, to communicate, and to solve complex problems, in a way classrooms mostly fail to do or even call cheating.
Game developers have a great deal of power, as do directors of films, and can use that power for good or gratuitously, but I think most do try to create experiences that allow people to exercise their imaginations and moral intelligence, to experience moral consequences, good and bad, without causing moral harm in the real world, to learn lessons that can only be taught in second, sometimes disposable lives.
That said, games do pose dangers. Getting too wrapped up in virtual worlds can rob us of real world opportunities and relationships, as might any technology or hobby taken to an extreme. We only live once and ought to make the most of it, but to say games should not be part of that experience is like saying books are a distraction and unworthy of our time. I don't think any GoodReads member would agree with that.
For those who are suspicious of games, along with your reading and writing literacy, I recommend discovering ludoliteracy (game literacy), which can be just as rich a life experience if indulged in moderation. You don't have to play the violent games, or let your kids play them, but you might also be surprised that you and they can learn more than violence from them.