I found that to be kind of a mixed bag. I definitely think that to get rid of addiction, you cannot simply take addiction away from a person because you leave a hole that they filled with drugs precisely because they are unable to fill it with anything else (if only at that time in their lifes).

Whether it is a good idea to fill it with some curious mix of African rituals and some even more curious psychedelics is questionable, but I think it's reasonably straightforward why it works. Snap them out of it, bring them into an empathetic community. A lot of approaches go like that. It's probably mostly placebo, but hey, placebo works 20% of the time.