If you are suffering from addiction, niether will power nor intelect will prevent you from acting out... (Have they for the past umpteen years?)
alef of learning to lead a clean life is an addict's realizing that they need help. MY intelect, and MY will power, are not strong enough to pull me out of the mess I can get myself into. I need help from the outside. For some, I think therapy has helped. Personally I don't see the benefit in that. For others help comes from a higher power, a perception of G-d as they understand Him. But as chazal say- ain chavush matir es atzmo. If you are bound by addiction, it is a very different situation than the regular run of the mill- intellect versus yetzer hora.