That seems undeniable.
After all, look at religions. The major ones have survived, and perpetuated their positions - including many glaringly counterfactual beliefs! - for thousands of years.
If we want to communicate to the majority of humanity, fables seem like the only way.
But the fables will need to be assembled into a coherent ideology, with a motivation for following it.
Whenever I have discussions like this I'm reminded of the L. Ron Hubbard quote: "You don't get rich writing science fiction. If you want to get rich, you start a religion."
It's a bit surprising that more religions haven't started with the motivation of making life better for everyone, instead of getting rich. Another strike against human nature.