> Determining progress in a therapy setting is usually a collaborative effort between the therapist and the client. An LLM is not a reliable agent to make that determination

Can anyone describe how to determine how a (professional, human) therapist is "a reliable agent" to make such a determination?

If you want to call into question the entire field of behavioral health and the training that is involved then that is fine, but if that’s how you feel then this entire discussion is really about something different and I can’t bridge the gap here.