Have you actually looked at that list? It’s incredibly inconsistent and chaotic. “Story structure” is not some objective universally measurable thing in the first place, and nobody in their right mind would claim that originality can be realised only in story structure.

Overall this is a weird and pointless topic that you picked to argue about.

So they take the risk of watching a movie that is somehow familiar to them ahead of watching it, and that might also be bad.