Many people enjoy discussing and judging the morals of characters in films, but that’s not the main point. Very few characters are entirely good or entirely evil, which tends to result in dull and poorly made movies. Regardless of whether viewers resonate with the story, they should show compassion for the characters. It’s important to interpret their motives and circumstances to understand what led them to make certain decisions and to reflect on ourselves.
To be interesting instead of one note.
They don’t need to have extremes or even contradictions, just some kind of nuance other than good/bad. Spiderman’s moral code being based on not stopping the guy who then killed Uncle Ben in the early 2000s films is nuanced. Captain America standing up for doing the right thing based on his personal experience is nuanced.
It doesn’t have to be moral nuance though. But that is one that gets a lot of criticism because it stands out so much for heroes and villains.
You’re correct IMO, but the examples are quite tame, again IMO.