Soldato
It's no different than a gambling addiction really, some people get extremely addicted to gaming to the point where it takes over their lives and ruins their career and social lives. Yes it's rare, they're not talking about people who get a game and binge it for 3 days, 12 hours a day, they mean people who wake up, game, have an unhealthy amount of sleep because they want to get back on the game, so wake up after 2 hours of sleep and start playing again, and do this consistently for months or years at a time, the problem with it is it is likely to grip a hold of younger people, who destroy their future because all they want to do is play games.
This isn't even counting the people who pour thousands of pounds into free to play games, the problem is they're designed to be addictive, no different than gambling.
Well any sort of addiction is similar, however there is a problem to assume an addiction is present in all cases if the requirement is playing a specific amount of hours.
For me it is as you describe, game/work/sleep. And gaming involves many things rather than just playing the game, various recruiting, single training, team training, tournaments, group events, managing, listening to complaints, working on google doc spreadsheets etc, watching replays, discussing strategy etc etc. I mean to the point where i do not actually "just play the game" for like an entire week.
All you need to ask is how much time you spend in your home that is not sleeping, because that could easily be all gaming. I played with hundreds of people over the years and the majority match what i've said above mostly, i would not call any of them addicts at all.
Gambling is something very different, because it does destroy you.