I wonder what the results would have been if people were showed documentary footage with no narration ? But my suspicion is that just like we sometimes see human faces in places they clearly don’t belong, structuring information in a story format (beginning, middle, end with rises and falls in between) is an intrinsic part of how we process.
Maybe it’s not so much that we like stories, but that we see stories everywhere and the more information takes this digest form, the more we feel at ease ?