One needent look any further than the energy industry to see that deregulation spawns graft, fraud, waste and abuse.
Besides, there isn't any "creativity" needed for treatment. We have SCIENCE for that. Only TBS's suppress proven treatment because they don't want to pay the cost of professionals' salaries, so they get uneducated hacks to implement non-outcome based "treatment".
Mental health treatment is, and should be, regulated. It keeps patients safe and assures ethical, proven treatment methods.