You missed his point. Once he saw what he was doing from his child's perspective, he was uncomfortable with it. Note that this is distinct from being uncomfortable with his child seeing what he is doing.
I had a similar reaction after not playing many games during grad school, which was 2003 - 2010. After graduating, I picked up a PS3. Some games it wasn't too much of an issue (such as Mass Effect), but in others, it was startling (such as Bioshock Infinite).
I think you missed my point, which is if he was uncomfortable with his child watching him play such games, don't let them watch such games. His negative reaction to "AAA" games in general because of that is what I found odd. If he no longer found the games appealing due to that then I suppose that's cool. But there are games in that space that don't fit that style of gameplay.
Again, I think you're missing it. He's not uncomfortable with his child watching him play such games. (Well, maybe he is, but that's not his point.) It was knowing that his child was watching him play such games that gave him the perspective for himself to see playing those games differently. He gained new perspective.
I had a similar reaction after not playing many games during grad school, which was 2003 - 2010. After graduating, I picked up a PS3. Some games it wasn't too much of an issue (such as Mass Effect), but in others, it was startling (such as Bioshock Infinite).