For Logan, alcohol and drugs "fixed" everything that he thought was wrong with him. 
He was on a never ending hamster wheel that eventually led to him living out of his car, selling his belongings, and turning to heroin, which was something he thought he'd never do. Music ended up being what ultimately saved his life. 

Now he gives back and talks at high schools to teenagers to let them know that it's okay to talk about their feelings and their mental health. That is so important to be discussed and not brushed under the rug, because it is imperative in fighting the addiction epidemic.