Wording is important, however.
Engineers used to use "recipes" now it's "blueprints." There's a reason for that.
Remember, a game isn't just the sum of its code and mechanics. Language matters if you're creating a world. You could have released the original Elite without the thick lore-packed manual and it would still be the same game, but it wouldn't have had nearly as big an impact on players. And how the fiction "works" does matter if you're going to have things that extend beyond the game (such as books, comics, videos, etc. set in the universe).
You're right that it doesn't matter much from a certain point of view, one strictly focused on gameplay, but as a writer and editor by trade, I see how it can matter a whole hell of a lot down the road in other ways.