A movie can work even if you know how these things. The how is just as important as the what in a movie, even if, for example, you know the twist of a movie, it can be just as fun to watch how you get there, how all the scenes and narration from the trailer is strung together into the movie.
I don't believe anyone here was suggesting that the movie becomes literally unwatchable.
But a movie is just a 90 minute experience. It's nice to maximize it. And one simple approach is to avoid giving in to curiosity by watching its 30 second summary for the same reason you don't read plot outlines on Wikipedia before reading books or tv show episodes.
I do actually go to Wikipedia and other places to spoil the plot outline to myself. Makes it much easier to focus on the implementation of the story rather than having to focus on both story and implementation.
I would disagree there a bit, I do it because I enjoy taking things apart and seeing how it all ticks together.
Like taking apart a running grandfather clock to see it tick.
Movies and TV series or even books are similar to me. I do enjoy digging deep into TVTropes and AllTheTropes so I can whlie watching a movie, take it apart and see how it ticks.
How the movie achieves the suspension of disbelief, how the heroes journey is being implemented in lockstep with the villain (if there is even one) or how a character is built, what parts make them what they are.
I think it's more of a hackers spirit rather than HN. I read the manual of the movie so I can take it apart like some hacker might read a device manual to be able to take it apart more easily.
For me watching a movie after one of these trailers is like participating in a magic show after the trick has been revealed.
You still enjoy it, looking for small details and appreciating how good or not the magician. But you won't get that sense of amusement of not knowing what's going on or where it's going.
