TD— my youngest son is a game aficionado. I have never played but he has taken me through two games -or at least as much as I could stand. One I did go all through because it had a great story. I am surprised to say.
Gamers even have magazines. The quality of art is high. My son has pointed out that the scenes created for stories that are more in nature than in, say, buildings consider all the things that make the games convincing: The time of day, the position of the sun that in turn affects the shadows. Ambient sounds etc. pull the players into many hours of it. He is the only gamer and he is far too absorbed in this after work in my opinion.
There are only 24 hours in the day. The interactions you have in a game absolutely are not equal to real world relationships. They are fantasy.
People need friends and involvement
And 2+2 is right. You describe the killing well.