Your friend has made a choice.
A friend of mine made that same choice.
He was told that if he quit drinking they would put him on the transplant list and he told them to F off.
Now he is dead, and dead due to his own choices.
I was not mad at him, I just thought his choices were really stupid.
I watched an interview recently of RFK, Jr (can't remember who the interviewer was). I was shocked by the honesty of something Kennedy said about his battle with heroin addiction. He said that he tried everything but just kept failing. He finally reached the conclusion that without turning to God, there is no escape.
I have much personal experience with this and can confirm the truth of his statement.
Alcohol is a drug like any other in a way. All drugs keep drawing a user deeper and deeper into addiction. Some drugs of course lead you to other, more powerful drugs and some, like alcohol just lead you to more use of the same.
And BTW a person doesn't have to be a fall-down alcoholic, per se, to be an addict. Plenty of people are functioning addicts who refuse to admit that they have lost power over their lives. They go to work, they have a family life...but they have to drink or take a drug every day just to endure life.
Back to Kennedy, he found that when he finally got around to asking God for help, he immediately started gaining back some control. He still went to rehab (he had been MANY times), but this time was different. Slowly but surely, he was able to overcome.
As a final note, when one is an addict, reality is blurry--upside down. You lie to everyone, but, most importantly, you lie to yourself.