I was reading this article on the value of knowledge in narrative form last week, and didn’t feel particularly surprised.
For centuries, the passing of knowledge occurred through oral traditions. Members of a culture were designated as knowledge repositories and learned all the knowledge available to pass on, and in turn passed it on to others. they were respected for this ability.
In time, written language was developed and these stories that had been passed were recorded. We now often refer to them as mythology or folklore. Knowledge was embedded in stories, and people were expected to listen carefully and interpret the meaning from the context of the story.
Of course it makes sense for knowledge to be passed in a narrative format. Much of what we know of ancient cultures was passed on this way.