It's a bad excuse, but a good thing to watch yourself for. The GP seems to mean it in the second sense, i.e. if you're the kind of man who gropes women when he gets drunk at code camp, you either shouldn't get drunk or shouldn't go to code camp.

If you know you're going to fuck up, there's no point in saying "it's just willpower, I won't do it this time", because that doesn't work for alcoholics or heroin addicts or paedophiles and it won't work for molesters either.