This is because unfortunately there are some so called hypnotherapist who are after making some quick money and don't really care about people. Some of these "therapist" start there own hypnotherapy school and offer weekend hypnotherapy training or like this one we recently found out on the web which you can study to become a hypnotherapist by just watching a DVD. Unfortunately some clients go to see these poorly trained therapist with no success which stops them from seeking help and getting better as they believe hypnotherapy has not worked for them.
So if you are looking for a hypnotherapist make sure that they are properly qualified. You should always ensure that your therapist is a member of CNHC which only accepts properly qualified hypnotherapists.