If therapists don't want to be seen as saviors or omnipotent or above everyone else, they should not present themselves as such. And many clearly do. Not all, sure, but I don't think there's any question of where the idea of high expectations for therapists/therapy comes from: themselves.

(Also, no one is saying that a client who threatens a therapist's safety should not be removed as a client. Unless I missed it, even the therapist in the article doesn't express concern for his own safety.)