The power I see with mds and hospitals (and insurance companies) is that once in the hospital - it is hard to get out without their permission. They threaten, coerce, imprison and so forth to inflict what they want upon you. I do figure out alternative methods or just live with 99.9% of the things that may afflict or befall me. Dental work still eludes my grasp however and so dentists are still a necessary evil that I have chosen to deal with.

A therapist may call the police upon you, but as I make sure I don't see ones with reinforcement - I can leave and although police could be called, I simply would not go home if I thought that was a possibility. I would go to the neighboring state or a different city for a few days.
(I know how it works in the two states near me because I work to get clients out of their clutches - I know how to avoid it).