You continue to sound like you get your info about addicts from Starsky & Hutch reruns.
Or Republican websites. Hardly anybody says they can quit any time they want. And if they do, it's usually for only a very short period of their life. If you run into anyone like that, then they should meet some addicts too. Seeing the reality in someone else tends to make you shed your crap ideas and misconceptions. That's why group sessions are a must for recovering.