Just to respond to the above, that's a very valid point.also, where I am training in the UK, I have met so many T's and tutors (who are also, or have been, T's) who are inherently honest and committed. I have only met one, I think, who showed any dishonesty in admitting to their own process with clients. I'm not sure which psychotherapy methods are based on myth, I guess if you are in the US I've understood that there is still a lot more Freudian based psychoanalytic work than in the UK now. But I would say that person-centred and psychodynamic work has empirical evidence for its ability to allow clients to use therapy as a vehicle of change.
So, I of course agree that some T's are dishonest and ethically flawed, as you say, same as all professions. But I would not agree that there is a lack of honesty in the profession, it has not been my experience. Clinical psychology, particularly cbt, has often been called to question because of lack of follow up evidence, but that's a different category.
And, as ever, a t cannot change how we feel, or behave, or cope. They can 'only' provide a safe, held space, and guidance as to how we can make those changes ourselves. It is inevitably an issue of personality and skills matching, cos we are all so unique.