I think it makes all the difference in the world. You don't give someone one swimming lesson and then toss them into the ocean. It takes time and reinforcement of what you learn at rehab. If he has gone so far as to complete rehab, then why shouldn't he take the next logical step to practice what he has learned there in an environment conducive to living a sober life? He needs all the help he can get and the better foundation he has under him the better off he will be. I think it's great that he seems to understands that.