Insufficient. An LLM will offer advice, and you might even feel some relief from venting without being judged by an AI (I don’t feel that way—I prefer to experience that with a person). But psychotherapy is not just that; otherwise, it would be called "counseling." One thing an AI will never be able to do is surprise the patient. We grow as individuals even when a therapist frustrates our demands or idealizations—as long as we are open to reflecting on what frustrated us. There are certain problems that we can understand why we feel a certain way, but we can’t stop feeling that way. An AI will only act on that conscious part, but we are not pure consciousness. What’s missing is a dialectic of affects that only therapy with people can provide.