This is why these folks believe 'plot holes' are the most egregious narrative crime imaginable and 'plot hole' is defined by anything that happens where the audience does not already have full understanding of the contributing factors to the event.
Isn’t a plot hole a logical inconsistency in the narrative? Conflicting pieces of information rather than a gap in the information. Though arguably it’s a poorly named term.
This observation helps to explain the obsession in Hollywood today with the "backstory." The backstory is irrelevant. Many great movies have none. But this obsession has resulted in many young peoples' inability to understand a narrative.
This, and there's an aspect where they think all media is a puzzle to be solved. That's why there are heaps and heaps of silly "fan theories" about everything, most of which are cliche ("All the characters are in limbo!") or insane ("Wendy from The Shining is the crazy one!").