Some people don't have an addictive and dependent personality, some do

"Adictive personalities" are like annorexia or alcoholism - words we have invented to make people feel better about their weakness and stupidity.
As for games being a waste of time or unproductive - of course they are. The problem is that
everything we do on this earth is utterly devoid of meaning. Our crazy monkey brains simply try and find patterns and meaning in everything we look at, but the truth is there are none.
Here is my favourite quote by one of my favourite writers (the end of which is in my sig I think). While bleak, depressive and soul-crushing, it does make the point very clearly:
... Looked at sky through smoke heavy with human fat and God was not there. The cold, suffocating dark goes on forever and we are alone. Live our lives, lacking anything better to do. Devise reason later. Born from oblivion; bear children, hell-bound as ourselves, go into oblivion. There is nothing else. Existence is random. Has no pattern save what we imagine after staring at it for too long. No meaning save what we choose to impose. This rudderless world is not shaped by vague metaphysical forces. It is not God who kills the children. Not fate that butchers them or destiny that feeds them to the dogs. It’s us. Only us.
Existence is random - something to keep in mind. Now this isn't a doctrine of "fuck it all, its meaningless", but trying to weigh one activity over another is pretty stupid. Sure, there are biological imperatives and racial traits (we are pack animals after all) but the world is too multi-faceted now to be held to such simple, black and white standards of "this thing good, that thing bad".