This may well be the path some people need to take. It is not hurting the therapist any. Perhaps the therapist may find a way to make it a winning situation for both, it may lead the client to figuring out a way for both to win. The therapist may actually realize they have been wrong. The client may come to see the therapist was not all wrong. Some people may need to see the therapist can handle all their rage and disappointment and so forth and not die or hate them. Some people may need to see they can survive other disappointing them. It may well not get the client what the client wants, but I don't see why the client should not try.
I just think it is not black and white.
(and I am totally against the therapist making any decision as to what is in a client's best interest - so I realize a lot of my stance in this area is based on that main premise for me - it is a big thing for me and I get somewhat worked up by the whole thought of health care people doing this sort of thing in any capacity. I realize this is not the issue for most like it is for me)