That's perfectly cool that this is your belief. However, I want to point out that those who do believe in the Christian version of God also believe that he is omnipotent and can absolutely kill someone's addiction. You can't expect people to take both sides of the fence.
That's fine. I can respect that belief, but I personally don't belief that.
Honestly, I think that it's kind of a cop out to rely on some "power" to handle addiction. Whatever works, I'm cool with. I'm sure "finding God" has saved many people's lives, but I just think that people should give themselves more credit for recovering from addiction.
If God can kill the addiction, then why do the vast majority of these "recovered addicts" relapse