I think it's because you have to use your imagination.
Just like active recall (essentially guess consciously before checking the answeris) a better way to learn I think the less detail their is in the story (book, game, movie, etc) the more you have to do yourself and so it becomes your own experience rather than someone elses.
This is like how people keep claiming Zelda Ocarina of Time is just nostalgia, but I first played it in like 2014 (after playing the others) and immediately considered it the best Zelda game.
