Yes, in his earlier life he did, but he had really cut down on drinking in the preceding few years. Reflecting back on that time, I would say he knew something was wrong but was in denial about it.
I think > 30% of fatty liver disease comes from insulin resistance
Yes, I've heard that as well but as I've said, the mystery is that he was 5"10' at 165lbs, he was fit. No diabetes or any health issues at all.