I'm not convinced that Reiki works, but I'm not convinced that it doesn't work either.
I keep an open mind about it. One day I might explore it and study it to see if it's bs.
But just because you don't understand sth, doesnt mean the other guy is a "nutter".
But of course there must be a lot of charlatans out there claiming they are Reiki healers since most people don't understand what it is.