Maybe your husbands doctor does not know the extent of his drinking. You are right in that the drinking is probably doing a lot more damage than the weight. A fatty liver is just the start of it if he continues to drink. It could easily and most likely will progress to fibrosis and then cirrhosis. Once it reaches being cirrhosis, that is permanent scarring of the liver that does not go away.
His doctor should have told him that no matter what is causing this fatty liver, that he should stay away from all alcohol since that would only hurt it more even if it was due to his weight. He should not be drinking no matter what is causing his fatty liver because alcohol would only irritate the liver more.
You know him better than us here, so I don't know if you can get it across to him or not that having this fatty liver is a wake up call in its early stages. If he chooses to ignore it, there may be very bad consequences he will have to pay in the future. I had cirrhosis from an autoimmune disease and had to get a transplant. I sat in clinic many days talking to people who drank their way to cirrhosis and was trying to get a transplant. The first thing they must do is to be sober for at least 6 months before they will even consider you for a transplant. Some make it, and many don't. Some can't or won't stop drinking. Some get so sick that they cannot get the surgery since they would die on the table. Everyone of those people I am talking about started out by having a fatty liver. He better pay attention. That is too much booze for even a healthy liver to handle daily. If his doctor knows about this and has said nothing, I would never want that doctor to take care of me.
liver transplant recipient