Ibogaine also reportedly has that effect. [1]
Out of the addictions you claim you had, only alcohol is severe. Cannabis is mostly psychological addiction but users often combine it with tobacco which is also physiological addicting.
Caffeine addiction is very easy to break with some sheer willpower. The withdrawal symptoms only last 1-2 days, and the side effects are a serious headache. That's nothing compared to heroin, nicotine, or alcohol addiction.
Sugar (and salt) is just a matter of habit. There is no conclusive evidence sugar is a proven addiction. You don't see burglars breaking in to steal sugar, do you?
Why would Ayahuasca work better than professional guidance (e.g. CBT) plus drugs with a proven track record such as Nalmefene, Naltrexone, Bupropion (Zyban), or Disulfiram (Antabuse)?
You wrote: "addictions [...] evaporated during my trip and did not return for many weeks". Do you mean your cravings were gone? I don't think one ever fully heals from an addiction. You're still an addict, just not one who's practicing their addiction (giving in to it). That is precisely where professional guidance can aid one.
To anyone who is addicted to alcohol I'd like to state: search professional help, please. Don't DIY medicate. If you are a severe alcoholic, you should not quit overnight. That is very dangerous. Instead, you need to slowly lower your dose. The best way to do that is, again, under professional guidance. A shaman might know a lot about Ayahuasca, but he's no MD.
Don't get me wrong, it is interesting to explore and discuss, and I'm also a proponent of scientific research in this field. However we should be wary with drug-related advice, or unrealistically high expectations.
[1] https://en.wikipedia.org/wiki/Ibogaine#Addiction_treatment (Yes, Wikipedia. Contains various references)