Movies today follow tropes* of movies previously made.
The Golden Age of movies followed tropes of literature and plays.
At the time of the birth of Christianity, the individuals who were giving birth were a mixed lot. Most were illiterate. Half were Jews and half were pagans.
The bargain reached between them could not help but be a mixture.
The so-called Doctrine of the Trinity is a compromise between monotheism and paganism, for example.
God is simply labeled ONE god even though (mysteriously) He is three distinct personalities.
Now THAT is a compromise hard won by many arguments, fist fights, banishments and sectarian manipulations!
Man's first guess as to WHY was superstition.
His next guess was Religious superstition.
What followed was Philosophy.
Religious Philosophy which produced Laws and Doctrines.
When government combined with Religion in the Roman Empire it became a power to be reckoned with.
*
There are many literary tropes that occur in fantasy fiction. Worldbuilding, in particular, has many common conventions as do, to a lesser extent, plot, and characterization.
Many works of fantasy operate with these tropes, while others use them in a revisionist manner, making the tropes over for various reasons including; for comic effect, to create something fresh (a method that often generates new clichés ), and objections to the effects of old tropes. [ 1 ]
And how, might I ask, did I specifically snub mp, kind sir?