Some people are obsessed with computer games and will spend enormous amount of time which could be better spent otherwhere if not for that addiction. I'm talking from my own experience. I can't experiment by living in another world without computer games, may be I would destroy that time in the other fashion or may be I would write some useful code, who knows.

But just blindly dismissing that kind of reasoning is not wise in my opinion. Casinos eat money from victims and they are regulated. Computer games eat time from some victims and time is quite important asset as well.

Of course just like some people can reasonably spend some little money to get some enjoyment in casino, other people can reasonably spend some free time in computer games without compromising on more important activities. But not everyone have iron will and iron grip over himself.