If you're not having fun with the game and you're extinguishing your social and physical health, then you have a gaming problem. If you're admonishing yourself for playing a single player game to recharge and relax, as in the cases I responded to, you have a self-admonishment problem.

Replace game with solitaire, is it now viewed differently?

Does every human activity need to be productive? Why would you care what others think about your hobbies?

My point was merely, some have a bias for types of hobby, not its healthiness.

I know someone who, while depressed was playing solitaire and one other casual game for hours every day, for months. It was definitely not healthy.