Is it mind control?

No, it’s not! That would be brain washing, and hypnosis is quite the opposite. Hypnosis is done to give the client greater self-control, not less. Hypnotists think of the client as the explorer in charge of the internal journey, and the hypnotist is merely the experienced guide. Even in deep trance, it is your own subconscious that does the real work, not the hypnotist. The hypnotist and the client agree upon goals and methods in advance, and even then, you remain free to reject any hypnotic suggestion you might not be ready for.