Personal Vs Traditional Stories

I attended the Barefaced Stories at the Blue Room last night. This is a MOTH style storytelling of true personal stories, usually humorous and often painfully hilarious as tellers reveal their past folly's and triumphs.
After the performances (which are capped at 6min each) I was talking with one of the performers about the genre of fairy-tales and metaphorical stories vs undisguised personal stories. She was arguing that metaphorical stories are constructed by an author and therefore have an intended meaning, while personal stories leave the audience free to take whatever meaning they want.
In some ways I agree with this, any metaphor is created out of someone's impression that the metaphor represents something and while someone else may have a very different impression or reading of the metaphor there is no getting away from the fact that there was an 'intended' meaning.
However, and this is what I find disappointing, personal stories while allowing the audience to interpret their own meaning also allow the audience to not question the meaning at all. By not 'intending' a meaning, 'no meaning' is achieved and this is what allows personal stories of this kind to become purely a form entertainment, divorced from the teaching and nourishing aspects that traditional storytelling has always had.
So this is the predicament for traditional storytellers; Stories hold within them the seeds of wisdom but our postmodern society rejects any deliberate attempts to convey an intended meaning, because doing so is akin to saying "I'm better than you because I know something that you should learn."
Since I am attempting to convey something i.e. how I feel and what I'm trying to figure out, I find that a metaphorical story can best describe it.

There was once a small island where lived two siblings. One day the ground shook with an earthquake and the people knew that a tsunami was coming. Now on this island there were two hills and each sibling ran and climbed one of the hills. One sibling looked across at the other and called out to them.
"Quick that hill will not be high enough, come up here with me."
"What!" cried the other "Your hill is lower than mine. You should come up here."
They argued back and forth but could not come to an agreement before the tsunami hit and the one on the lower hill drowned leaving the survivor alone and miserable.

I want a better ending for this story. I am not content to either be drowned or miserable but how do we discover which is the higher hill?