Very well structured and thought out article. It's clear you put a lot of work and thought into this.
I completely agree with the conclusion, videos games almost always make me feel better and make my brain more active after I played for a bit. But not everyone's brains work in the same way, could it be possible that while games have a positive effect on most people, some people could be negatively influenced by games?
That's a fair point - However as some other people mentioned in the comments, I think a lot of it comes down to self-control and moderation.