I would hardly equate drunk driving to Novotny's actions.
But to address your analogy, I simply do not have enough information to tell whether Ms. Novotny is a bad actor or not. In the absence of such information, I can only assess a situation based on my prior life experiences.
Either way, I think the idea of "the banality of evil" is more useful here than Hanlon's Razor. Claire Novotny may well have simply not thought about her actions. Is she still responsible for them? Should we care that she meant well if she continued her bad behaviour after it was pointed out to her?
And what if somebody makes a habit of not thinking about their actions despite having it pointed out to them repeatedly that their actions cause harm to others? (It sure seems to be an effective way to climb the ladder.) Can they still hide behind the defense of "meaning well"? By analogy, what if somebody makes a habit of getting behind the wheel while intoxicated. If they hit a pedestrian, how much do you care that the drunk driver meant well?