It's a different school of thought for sure. We find traditional therapy to be very synergistic with it. Sometimes one can cognitively know how to fix something, but despite that it still sticks in the body. Ayahuasca can help to "percolate" that knowing into the body/nervous system for great results.
First off, the scientific method only finds things that are less wrong, there's never anything even close to certainty and finality. Your entire life's work could be entirely replaced by an Einstein.
Secondly, there's an enormous volume of trade, industry and commercial knowledge that has exactly zero published studies but sufficient less-wrong "scientific" testing to be knowledge.
And yet that's how things should be done, based on decades and centuries of craftsmanship, apprenticeships, and corporate knowledge.
Your opinion is exactly why I posted what I posted. The scientific method is powerful, but it's extremely slow to propagate.
I guess a primary source like myself doesn't count for much, but fwiw I have seen hundreds of people go through this. Those that have done a lot of therapy (and have little to no experience with psychedelics) often have a lot of tools they've accumulated over their journeys and tend to get a lot out of it.
This is precisely why peer reviewed studies are so valuable and sources so important. Folks can properly value anecdotes (which can be valuable, don’t get me wrong) against other sources of knowledge.