Hello atalose,
While I can appreciate what you are saying let me ask - have you ever been in this situation? If you haven't then you cannot appreciate the dynamics of it. I have known people in similar situations and it is very easy to say these things when you haven't experience them yourself. Yes the person is an alcoholic and has acted badly but the relationship wasn't all bad. I fell in love with the sober part of him. If he didn't have a drinking problem I could see myself spending the rest of my life with him. I gave him numerous chances because I had hope he would get help and become sober. I wanted to believe what he was saying.
It took a while to come to terms with the fact that his actions were not matching his words and that I could not continue to be with him if he continued to drink.