I’ve said he’s responsible for his harms to others while drunk because even if impairment removes his self-control, drinking caused that to happen. But that’s not because I think raping (or murdering) is someone’s true self and they’re basically just stuck being a fundamentally bad person. They should pay for the consequences of their actions, dedicate themselves consciously to never reoffending, and then never get drunk enough to lose control, because that’s a consequence of drinking.

I don’t think most people exhibit personal growth (at least initially) by actually changing their fundamental impulses but by dedicating themselves to controlling those that are harmful. And maintaining that control is part of being committed to it. Maybe over time that changes the impulses themselves, but it’s curbing the impact to others that matters morally.