I am posting under a name change to avoid sharing personal details. My father is an alcoholic. He has only once sought medical help for this - he 'dried out' for about three weeks and the first thing he did on discharge was to buy a bottle of whiskey. Most of the time he denies he has a problem.
He has no liver disease, despite about thirty years or heavy drinking.
What he does have is alcohol related dementia (this does not make him totally demented, but he is forgetful and often confused); alcoholic myopathy which is a progressive muscular wasting disease (to do with the way alcohol affects the metabolism of protein) and finds it hard to walk (he uses a mobility scooter to go to the off licence round the corner) and this also affects the muscles of his bowel and bladder with predictable results. He also has destroyed all the relationships he ever had with friends, family and indeed my mother. He often falls in the house and lies there for some time (often in his own waste) until he is sober enough to pick himself up.
No one likes him any more. He is a pain in the arse. I used to beg him, crying and breaking my heart, to get help, and so did my mother. He has (had) a large and loving family who would have supported him and helped him and encouraged him - but he preferred to have a relationship with whiskey than a relationship with any of us. He had (has) a choice to seek help - his addiction is so powerful he's gone far beyond the 'cutting down' option and no one would expect him to stop by himself. But he threw all that back in our faces.
I don't blame anyone for developing an alcohol problem. I have seen how it sneaks up on people. But I am, I am afraid, very judgemental towards deniers and people who will not seek help - who reject the people they love and who love them.
And in answer to the OP - of course a bottle of wine a night is a ridiculous amount. It is not the same amount as my father - he gets through 6 litres of whiskey a week - but he certainly used to drink a bottle of wine a night.