Again, show me a master/preacher/cosmic messiah who dropped their woo.
I'm well aware that all manner of people come to their senses about woo every day. I was an ardent believer in ghosts myself until I was clued in to vivid/waking dreams and never looked back.
If you are leading/teaching woo, rather than just participating, you are either desperate/mentally ill, in which case no amount of evidence will penetrate, or you know it's crap but are bilking people. I feel no need to use kid gloves on either.
This is not someone telling their friends to go see Madame Zelda the fortune teller, this is someone who spend 2 years, and I assume a lot of money, learning to do new age faith healing. She may be a lovely woman in every other aspect, but her woo will be impervious to all logic.
"There are none so blind as those who will not see"
Uh, pardon me.
I'm someone who devoted a lot of time and money into "energy healing" including Reiki of which I did master level training.
I never used it to bilk people or tell them they didn't need proper medical attention.
I quit it because of the woo-woo baggage, the unsubstantiated claims, the money racket associated with Reiki, and the feedback I got from people that they felt their personal space was violated.
When I was a believer in the efficacy of energy balancing, I was not mentally ill, just a bit deluded, as my species tends to get with many different kinds of beliefs.
But of course I wasn't a big name faith healer. And it is indeed rare that those who have made a public career of it are able to let go of the show.
Also I wasn't a "Master" in the sense of having years of practice and learning.
Mostly these days, "master" in Reiki, simply means one has been initiated into the use of the master Reiki symbols.
So. it's not that unusual for a Reiki "master" to at some point for varying reasons just drop the stuff.
When I encounter a massage therapist who uses Reiki in her practice, I don't level the whole huckster accusation at her. Instead I talk about what it is and what it isn't. And the placebo effect. relaxation response, and how it can temporarily relieve some symptoms but is not a cure.
But of course there are people exactly as you describe.
I have an xgf who is challenged that way in both mind and character.
She took offense at me for no longer believing energy healing was the true path. And then the "fairies" told her to break up with me.
Yeah, I thought I had a special healing power.
I was merely good at relaxing frontal cortexs, so to speak.
I could have been Rasputin, but I had a conscience.