Has it EVER occurred to you that most M+ games are bought by teens in high school/people who don't have children yet?
Now, violent game playing should be up to the parents/guardian, but FPS, RPGs and others CAN help with certain issues- for example, for HEALTHY (no PTSD) soldiers, they found out that frequently playing games where there is violence might help with common PTSD symptoms.
Something else: The rating industry is not very accurate. Most M+ and T+ games have the rating put in front of them to show that this game should be up to the parents/guardian to decide whenever or not to let their kids play it.
Violent Video Games - Addictive and Dangerous I have observed a young man occupy his precious waking hours for several years now doing violent video games, to the sacrifice of his schooling, his portion in household maintenance activities, his friends, communication with the family, and looking for a job. He misses his meals as his body clock is upside down. He hardly goes out as his eyes and whole attention is focused on the screen - even when in bed and in the toilet. What kind of future awaits such poor soul physically, mentally, morally, and socially? How many of our youth in the whole world do exactly the same, instead of committing themselves in acquiring knowledge and skills useful to themselves, their families, their communities, and the whole of humanity? Who are making these games and what is their purpose? Moneymaking and nothing else? I believe the government and institutions of especially friendly and peaceful nations must ban these. It's an insult to the current human psyche, to humanity as a whole after the gross horrors and suffering from two world wars, and the promulgation of global, if not universal,