I have not convinced anyone, but my father said when I told him I was pregnant, he realized he needed to get his life together.
It took him many years to realize why he was so angry and mean. Then it was hard to admit he had a drinking problem and even longer to realize he was addicted to drugs.. He had been smoking pot for 25 years, but did not think it was an addiction. He divorced his second wife. Moved back to town, attended AA meetings, found a new job, new friends..
People will not change unless they want to. It takes a lot of energy to break a bad habit, to seek help, and to be able to keep up with the changes that are needed. It is the person with the problem that must really want it. No pushing pleading or prodding can make them do anything. Some people just have to hit rock bottom.
I have learned it is not a reflection on me, if they cannot change. It does not mean they do not love me. That they do not respect what I am asking or saying, it is that they are weak, afraid and just feel too overwhelmed.. Or they just do not care and are not bothered by their condition or status.
And yes, My father is remarried to a wonderful woman that we all love. He is proving he can live this life without temptations of his old life. He is not perfect, but he is so much better, it is like he is a totally different person.