A disease is not the same thing as a spritual malady. A spiritual malady means something is inherantly wrong with you. A disease is an infortunate condition out of our control that has symptoms we can STUDY-like brain abnormalities, stuff oozing out of you, pain, death, etc. AA wants to conflate the two. That way, they can tie in everything else thats going on in your life with your addiction, when there is no proof anywhere that our spirituality or deep seated convictions play a role in addiction.
Real science can't really take account of spirituality because there's no way to study it. We can't isolate a spirit in a lab.. and we can't recreate "spiritual awakenings" in one either.