What does "better" mean to you though?

Is it - "I was upset about something and I had a conversation with the LLM (or human therapist) and now I feel less distressed." Or is it "I learned some skills so that I don't end up in these situations in the first place, or they don't upset me as much."?

Because if it's the first, then that might be beneficial but it might also be a crutch. You have something that will always help you feel better so you don't actually have to deal with the root issue.

That can certainly happen with human therapists, but I worry that the people-pleasing nature of LLMs, the lack of introspection, and the limited context window make it much more likely that they are giving you what you want in the moment, but not what you actually need.