The vague "obtaining potential advantage" is unreasonable. An advantage at what? China doesn't benefit from the US suffering, much like the US has actually benefited a huge amount from Chinese prosperity.
> Your comment here belies the benefit because at its core is the most dangerous assumption: I am too smart to affected by propaganda.
Quite the contrary; We're supposed to be affected by what we listen to. But I'm not smart enough to figure out what the Chinese think without going and listening and reading to things written by Chinese people and pushed by people with Chinese perspectives. We're not psychic and the Western media are also unreliable. Listening to diverse news sources is important. Particularly since the truth is often the most effective form of propaganda.
by making the main characters of a movie American, and giving them positive traits, you're 'obtaining a potential advantage' for every American that travels abroad is associated with positively portrayed fictional characters, or in biopics, historical characters.
Zero Dark Thirty is perhaps the most egregious example of this, with the CIA consulting and the film depicting that the information leading to Osama Bin Laden's location was extracted under torture from an inmate (it was not).
Many American films are not even casually not propaganda. The way you think about the US military is shaped and influenced by the influence the US military gets from fronting money, consulting and equipment appearances to appear in Hollywood films (with sometimes some weird consequences - for example they refused to back The Avengers because they felt SHIELD undermined the portrayal of the US, but were happy to back The Winter Soldier because in that SHIELD isn't the US DoD and goes down).[1]
[1] https://gamerant.com/marvel-military-propaganda-explained/
Propaganda aimed at your enemies isn't about achieving any specific goal, it is about obtaining potential advantage. It's an investment, the same as funding a startup but with much broader success criteria.
Your comment here belies the benefit because at its core is the most dangerous assumption: I am too smart to affected by propaganda.