Yes, this is exactly what I meant. TTRPGs typically have more time spent not doing anything compared to computer games (and board and card games too, to a lesser extent) simply by involving a group of people and being largely 'single-threaded'.

As for what I mean by narrative, much of the appeal of D&D seems to lie in crafting the story and adventure, being a part of the plot. If the setting and narrative were completely removed, and the game was reduced down to the most basic mechanical actions - go to location x,y and do foo to bar, etc., it would be a very different game.

Not to say the mechanical aspects don't make up part of the appeal of D&D and other TTRPGs too, but they're not a focus as much as in, say, a computer strategy game, or even something like an action platformer, where that is the game, and story/characters/etc. make up little (if any) of the gameplay.