Most people with substance abuse problems “grow out of it” with no outside help at all. https://www.google.com/amp/s/www.psychologytoday.com/us/arti... Just from personal experience partying with lots of drugs and drinking in the rave scene when I was in my 20s and djing and promoting, the vast vast majority of people just got tired of it one day and quit — or it interferes with their jobs or their families and they…
They miss the blindingly obvious point that every single person in treatment has already tried and failed those "self-help" ways. Treatment is a final, desperate, step for alcoholics, once all those self treatment methods have failed. You can't compare the two, and the first treatment has already failed for the second group.
It's like saying Tylenol is a more effective treatment than going to the hospital, because more people get better that way. Of course they do - because they have a less serious problem.