You obviously have no Idea just how hard it really is to kick an addiction once and for all. For someone who has been drinking or drugging for as long as Mr Williams has, to just stop without ever falling off the wagon is a very unrealistic expectation. People like this really have no clue how to live a normal life without alcohol or drugs, that is something that they will have to relearn how to do. The fact that Mr. Williams is entering rehab is a good sign.
You really should try not to be so harsh and judgmental of people
I hope hope you find enough compassion one day to forgive others for their mistakes. Who knows, one day you might be the person in need of help, or forgiveness. What will you do then if other people treat you the way you treat people yourself.