I've seen another way of looking at alcoholism/gambling addiction/sexual addiction/ drug addiction/ shopping addiction. Some argue that these aren't separate illnesses, but actually one only, and that is called addictive personality. Having an addictive personality is mostly caused by upbringing, surroundings, and opportunity, but it actually even has some genetic roots to it.
Most people who possess an addictive personality often have an addiction of choice and often if they cure themselves of this addiction, they leap to another one. For example, an alcoholic or drug addict might smoke more if they stop one or both of the first two, a shopper might slip into gambling addiction and so on. Statistical studies show that these progressions are common.
Usually it is partially due to a simple way in which a brain releases dopamine and other pleasure chemicals, combined with psychiatric issues. However, the disorder of being addiction prone is more social than medical so counciling and changing one's own environment socially are more helpful than any sort of drug that exists or ever could exist.
I know some of you will be more synical about the good or lack thereof that counciling such as therapy can provide, but it relies on the patient far more than the councilor in many cases anyhow and I've had a lot of good done for me when I was younger with therapy so I'm for it.
If you think of addiction as one illness rather than many separate isms, it isn't so difficult to understand, the medical community is just acknowledging that gaming is something people can be sucked into just like a lot of older issues. I think maybe writing out Gaming addiction as something entirely different is not the way to think about it, but with people who are prone to addiction, it is one way they can wind up going. and it needs to be known.
But the treatment is going to be the same as any other addiction and the cure that will actually work will be the thing that cures the inner psychological wound the person has, heals low self-esteem, or gets them out of the social situation where addictive actions are readily indulgible.
That's where I stand and this is an alternative way to look at it.