I don't know if ChatGPT is good for mental health. My guess is it's probably terrible, but maybe not. I'm not a psychiatrist and stranger things have happened.
What I do know is this: while you open up to the chatbot and reveal your innermost private thoughts to it, OpenAI and Microsoft are listening in, and they're probably selling all you're saying to data brokers and advertisers - sorry, "partners" - almost in real time.
If that doesn't creep the living shit out of you, you probably do need psychiatric help...