We need a complete rethinking of gaming. For one, stop weaponizing the main character, marking progress by how much more competent he gets at murder. Let's not follow in the footsteps of Ted Bundy (xp gains for seduction, rape, and murder), Anders Breivik (proficiently murdering liberal "monsters") or Hitler (level 50 as a result of millions of "monsters" killed, extensive looting of the dead accomplished).
Stop being insecure about your masculinity. There's no need to kill thousands or millions of "bad guys" or "monsters" in a game in order to prove yourself. If you're so eager to prove you're a man then do something good for the loved ones in your life. "Saving the world" in a video game isn't having any effect on the world.
Games should be like other forms of art, in that their value is in what they teach us about the world we live in and about each other. Murder is ongoing right now in the world, 50,000 people die each day due to easily preventable starvation and disease (murdered by the global economic system), so clearly murder needs to have a place in artistic mediums, and there's nothing wrong with playing as a mass murderer in a video game. But human existence is vast, varied, there are many important things going on, and murder however important is merely a small part of human life. So it's simply wrong for it to play such a key role in the video game industry.
Video game after video game teaches us that the world is filled with monsters, bad guys, whose job is to offer token resistance prior to being murdered by the player through a proxy with the ability to time travel even after death (the reload function) and access to human intelligence and adaptability. Is that really such a good lesson for us to learn? Is romanticizing ourselves into heroes, empowering ourselves into superheroes while demonizing the rest of the world into monsters or bad guys, kicking their asses, taking names, and asking questions never, such a tremendously good idea that it deserves to be a large majority of the industry?
Should we hide behind the all-encompassing answer of "fun", ignoring everything else? Should we hide behind our supposed fantasy of being super-powered killers, saving the world from the bad guys, one corpse at a time?