Games cause addiction?.
Yes, no doubt. But in extreme situations of use.
When somebody is playing games all day long and forget family and friends. When somebody waste all its time and don't do nothing productive, then there is a serious problem.
By the other hand play computer games moderately it's, under my point of view, something good. Isn't a waste of time. And if we consider that as a waste of time, then we can consider a waste of time for example go to the cinema or to the football, etc.
Resuming: the extremes are always bad.