Basically, I think all games -contain- art and are made up of it. But to talk about games, as a coherent product, being artistic in nature, you can't just have pretty graphics, nice music, or an interesting narrative. Your mechanics need to be, themselves, central to the overall artistic experience, or you're experiencing art-in-games rather than art-as-games.
Just to be clear, I'm disagreeing with your argument, sometimes implicit but often explicit, that tactical elements make a game less of an RPG. It's perfectly fine that you don't prefer that kind of game, haha, and I understand that. I'm not even arguing that tactical-style RPGs are objectively better games. This is a purely definitional discussion.