I should’ve been clear on that but I absolutely agree; an LLM is a bad therapist at best, and a hallucinating ego stroking algorithm eventually.

Yes but still, talking to someone helps. No matter what they say back. If an LLM is the only thing around at the moment (e.g. in the middle of the night) this can be useful for therapeutic purposes.

Therapy isn't only about what the therapist says to you. There is a lot about you talking to them and the process that creates in the mind. By sharing your thoughts with someone else you view them from a different perspective already.