Are you arguing that it's impossible to learn without feeling bad about yourself? As in, you must feel personally ashamed and hurt, or else you're going to make the mistake again? If not, you're probably going to have to explain your position a little more, because that's how I'm reading it right now.
Note, this can't be some abstract equivalence between "feel bad" and "know you made a mistake," because if that's what you meant, then we're back to the vitriol being unnecessary.
Note, this can't be some abstract equivalence between "feel bad" and "know you made a mistake," because if that's what you meant, then we're back to the vitriol being unnecessary.