And the reason of course, is that writers are people. Like They Always Have. Movies rarely end in uncertainty. Audiences don't like uncertainty. And highbrow movies don't assume narrative is artificial.
All narrative is artificial.
It's manipulated, structured, controlled, constructed, invented. Narrative is fake. Of all the films to pick on, Hunter chooses Pulp Fiction. There's nothing uncertain or noncommittal about its ending. The two gunmen walk out of the diner toward absolute certainty, one committed to his own spiritual awakening, the other to his doom.