I think some films, especially movies that aspire to win academy awards, are meant to be played to the world wide lowest common denominator. Movies are made for USA and Chinese audiences first, but they are also made to be easily sold in Europe.
This isn't to say that Hollywood thinks everyone is dumb, but they recognize that all these different people who grew up in different places aren't going to understand the same idioms, or may miss subtle, cultural clues. The director has to spell things out. This explains a lot of what the author coins New Literalism.
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