Scribe
Legend
I think I’m getting it from my own reading and something both Mark Waid and Kurt Busiek have said - Waid basically has defined Superman dystopia (Kingdom Come, Injustice etc) as “what if Superman makes a big mistake, which is something he’s not allowed to do in normal continuity?” Busiek defined Clark and Steve as the moral poles of their respective universes - whatever they think is right, and they define what is right by what they do.
Which isn’t to say that there aren’t some stories where Superman doesn’t make a minor error and then correct it, but it’s still part of his infallibility that isn’t part of any other superhero (except Captain America). Iron Man is made of mistakes, and Thor makes Gotterdammerung level errors. One of Peter’s defining storylines (however much one hates it) is one gigantic mistake. Batman effs up all the time but likes to pretend he’s still the cleverest man in the room. But Clark? His salt of the earth morality means he’ll always do the right thing when it counts and any minor errors won’t have lasting effects.
I have a much different reading on some of this than you seem to.
He (Superman) is fallible. The point of those other story lines, is not that he can make a big mistake that he 'is not allowed to do' meaning he is infallible, but that he makes a choice which runs so counter to his morality, that to do so would be nonsensical in the normal canon.
Batman on the other hand is broken, as I prefer my heros, and while he makes mistakes, he doesnt have the obvious power tier to go full on dystopia like Superman.
Anyway, back to work for me.