Hypnosis has had a chequered history and reputation and for some still can elicit a wariness regarding its power. From the beginning of consciousness the mind was and is susceptible to suggestion. The problems arose because Dictators and Despots understood this and used it to their own advantage.(Generals and religious leaders too)
Ironically visiting a hypnotherapist is often the way to become de-hypnotized, and see the world from a different perspective than the one we were 'told' to see. Dictators and some more extreme church leaders sought to demonize it and keep it for themselves. Add to that writers such as Dickens, who portrayed hypnosis as an occult force, and one of the first Disney cartoons of Minnie mouse being kidnapped by a malevolent hypnotizer and one encouraged the negative perception some people still hold.
Bluntly, these preconceptions should be forgotten. They make as much sense as holding the car responsible for a car crash! Hypnosis is neither good nor bad, moral or amoral, it is just a series of techniques that allow or facilitate suggestion - by others or by oneself, to bypass the critical faculty and allow the most powerful part of our mind to attempt to grind out whatever suggestion is implanted. (I say attempt, not always does)!