My husband's father has similarly "cured" himself of his past addictions by smoking weed all day, every day. He's a functional addict now...which I guess is something. My husband often thinks that it's a great solution for him...he wants to follow in Dad's footsteps. Other times, he gets pissed off at his father for judging him.
I'm not sure what I think. I am uncomfortable with my husband using any substance, ever...but it's not my bucket of shit if he does use. I thought it was interesting to find this article about Richards, though, as we were just talking about his dad's marijuana "cure" last night.