I also know that the mind can be manipulated with sound vibrations and frequencies.
Good example are the binaural beats. Theta waves, for example, can put you in a deep trance. As for Alpha waves, not quite so deep meditation, is used to communicate with animals. I did it with horses.
Well.. I went to see the Beatles in 1967 in a concert in Bournemouth, Dorset, and I can assure you that I personally talked to Paul, and that he signed my LP.
I agree, it's all about control. And, if the person/patient is gullible enough to believe that they're going to be cured, then it's like the placebo/nocebo effect.
RE: Why sailing is noble...
You could try a cup of seawater?