It reminds me of a story I've read, where someone from an early-21st-century capitalist culture goes back in time and tells a few Cro-Magnon hunters and gatherers what wonders the future will contain, and they (very convincingly) argue that they are no overall improvement at all. (Of course, there are many more people alive today than Earth could support if agriculture hadn't been invented, so a total utilitarian would disagree with them.)

If you already knew a movie, you wouldn’t watch it.

The usual framework seems to not apply here: IIRC there's some theorem showing that the value of information cannot be negative, but that seems obviously false if the information in question is the ending of a film you've already paid a ticket for.