Most modern day belief systems were founded prior to the rise of the scientific method.
What this means is not only were the writings that underly those belief systems often scribed in different languages, by writers in different cultures, but that the need to prove themselves right or set out a formulation of systemic beliefs were not a priority to them.
It may be our own hubris that says ancient writings must be interpreted thru modern lenses.
We, as denizens of the Information Age, approach the idea of the divine with a different agenda and perspective than our ancestors.
Possibly even with a perspective that was never even contemplated by them.
When story is paramount, proof is rarely even secondary.