Addiction is an overlearned, maladaptive habit.  'Maladaptive' means that it goes against a person's survival as a human being.  People are not responsible for developing a habit or for not simply being able to stop the habit.  However, escape from the addiction cycle can only occur through active participation and responsibility of the addicted person.  IT TAKES TIME, PATIENCE, & COMMITMENT.  
Treatment is basically a BRAIN REMODELING PROJECT