Consider how some people get much more satisfaction out of being in a World of Warcraft guild compared to going to their public school. There is nothing that would make it impossible for a job or a school system to be as engaging as a video game, and there are actually people I once met at the Game Developers Conference (GDC) who are trying to do that.
On the other hand, from the perspective of evolution, the human brain did not evolve in the presence of things like high fructose corn syrup and infinite Facebook feeds, and so it can require unnatural efforts to use moderation, especially if someone is predisposed to be particularly addicted to something.
So, maybe like most things, the issue is more nuanced than just "video games are horrible" and "video games are completely good."