But can't it be said that someone who is submitting themselves to a 'higher power' is, in actuality, expressing self-control-- albeit using a new, radical psychological strategy to do so? They are necessarily convincing themselves that the agency responsible for their addiction (their 'self') is no longer in control, and that some greater entity (which in actuality is still their self, however it is now viewed unburdened by its historical poor decisions) is going to guide them towards sobriety. It's an effective, pragmatic self-delusion which can still be said to be the product of reason and self-control.
"What holds attention determines action." - William James