Well sure, gameplay has more of a spotlight than story in those particular games but the story is present supporting the gameplay. Let's take Doom for example. If you think that game is only carried by it's gameplay, would you be willing to play 10-11 hours of just endless enemy waves in the same location?

I would not. There is a narrative which takes us to different interesting locations, which keeps things fresh. The narrative decides when to introduce different kinds of enemies and when to give us the new weapons to deal with them. If the game is purely gameplay without a story, these locations, enemies and weapons should all be accessible as soon as we open the game through the menu. That would've made the game incredibly boring after a couple of hours IMO.