Story only matters when you're playing RPGs, or something else when the story is constantly thrown at you. But I even managed to get through FFX-2, due to it's fast coolio battle system.
Maybe, maybe the gameplay is more important because it takes no effort these days to press a or wait for the animated cutsecene to end, than to navigate through piss-poor gameplay. But there are plenty of games out there that have a good mix of both.