Every event that occurs in a novel sheds light on all the novel's other events. This annoys Thomas Kurton, the scientist character in Generosity by Richard Powers --
“... fiction's perpetual mistaking of correlation for causation drives Kurton nuts. Even Camus can't help deploying bits of his characters' histories as if they explained all subsequent behaviors and beliefs.”
What Kurton sees as spurious correlation, Marshall Gregory in Shaped by Stories sees as a big part of fiction's appeal --
“Too much of my life – and yours – gives us the sense that the parts don't fit together. In contrast, the analogies of fiction and other narratives provide us with points of comparison that let us see what greater focus, organization, and unity our lives might possess.”
It's in our nature to look for patterns; when it comes to spotting connections, a false positive is likely to be less hazardous than a false negative... at least until you become clinically paranoid...
How much of our enjoyment of fiction stems from its providing more opportunities for connection-spotting than our real lives do?