I don't really follow the last clause. You seem to be arguing against the idea that 4-colour superheroes are absurd outside of their own genre tropes: I disagree.
I'm arguing it isn't a binary choice. Sure, 4-Coulour Superheroes who do nothing except fight the villains are a little absurd. But the choice isn't "I must either stop the villain who plans to explode every child on earth, or I can build railways across the Tundra that would increase the reach of medicine to isolated communities" You could... do both?
Just like for the Paladin, it shouldn't be "I either reveal the entire scope of our plans to the bad guys, or I must lie and break my oath!" or "I must either force us into a frontal charge regardless of the cost, or I must break my oath!"
None of what you say here is true. You are making assumptions about the relationship between action resolution, and how the fictions is established, that are not obligatory.
Am I? You are the one who said that Paladins only function in world's where doing the Noble Knight charge the front gates schtick is the only way to truly win. IF that is the case, then using magic and trickery must be routes to failure. Because if they are routes to success, then the Noble Knight schtick isn't the only way to win.
I don't really follow how refusing to answer is lying by omission. In what way does it cause someone to believe what is false? Where is the element of deception? It seems, in most cases - like your interrogation example - to cause the interrogator to believe a truth (ie that this person knows but won't tell) and to not deceive at all.
I agree with you, and yet I have seen people over and over again state that, because their oath says they cannot lie, they must answer any question fully and completely. Why do they do this? Because to do otherwise would be lies of omission is a common answer I have heard.
This is what I've been getting at. Many people play paladins... stupidly. Lawful Stupid isn't just charging the dragon, or studying rustic architecture while the party is engaging in torture. It is responding to the Villainous Guards when they ask "who are you?" with "I am the Hero Tom Lawrenceville, of the House of Lawrenceville, sworn sword of Light here to slay the evil Baron!" because just telling them "Tom, a traveler" would "be a lie". It is the performance of "HONOR" and "NOBILITY" with no regard to the effect it has, just that it is dramatic and obvious to everyone that you acted with "HONOR!" and "NOBILITY!" so you can be acknowledged for it.