I think it is more "mind over matter".

I strongly believe that the "cure" had to do with the believe in it.
In combination with a ceremony it will empower that feeling.

Same as visa versa:
If you keep telling yourself that you're sick, you'll become sick in the end.

That's why religious wonders occur.
They do occur, but not because of some divine intervention, but due to the believe that a divine intervention took place.

"Set and setting" is not only needed in trips, but trough your whole life and every stage.

Hence the good results with placebo by example:

"Credendo Vides"

By believing one sees