The use of metaphor in storytelling no doubt goes back as far as the time humans first spoke to one another.
That’s because the concept works; allowing each listener, and later reader, to personally identify with a story in their unique way.
When I read this article by Ali White about hiking the entire length of the Appalachian Trail in the eastern USA (2200 miles) it stirred up a lot of inner thoughts and feelings about my life.
Maybe you’ll have a similar experience.