arguing that we should embrace ambiguity. This is probably my most despised media trend of the 21st century, and that's saying something. "You decide how it ended" "You decide if she lived or died" "Their motivations for doing that are up to you" "It means whatever you want it to mean" It's an excuse for lazy writing and for being too cowardly to make decisions.
I love being made to think during a movie. I despise the movie ending without an ending.
It's incredibly easy to set up a scenario that could have multiple endings, but it's hard to see what the ending actually is before it happens.
It's a lot more entertaining and satisfying to view that scenario to the end and then have the tale end in a satisfying way.
Any idiot can come up with an ending to those tales. (And they do, because you'll find them posted on the internet afterwards, even if the movie already has one!) Only good writers can come up with good endings.