I disagree. Think of the places where corruption is endemic. Having an outlook of "well, everybody is corrupt" normalizes the behavior and makes it easier to j

I disagree. Think of the places where corruption is endemic. Having an outlook of "well, everybody is corrupt" normalizes the behavior and makes it easier to justify sliding into corruption oneself. If the outlook were useful, it would help to fix the problem instead of doing the opposite. The disillusionment doesn't offer any benefit that can't also be gained with a touch of common sense alone. But going from "some people are terrible, sometimes" to "everybody is terrible" forecloses any possibility of improvement.