I heard someone say that LLMs don't need to be as good as an expert to be useful, they just need to be better than your best available expert. A lot of people don't have access to mental health care, and will ask their chatbot to ask like a psychologist.
This mostly makes sense.
The problem is that people will take what you've said to mean "If I have no access to a therapist, at least I can access an LLM", with a default assumption that something is better than nothing. But this quickly breaks down when the sycophantic LLM encourages you to commit suicide, or reinforces your emerging psychosis, etc. Speaking to nobody is better than speaking to something that is actively harmful.
I've heard people say the same thing ("LLMs don't need to be as good as an expert to be useful, they just need to be better than your best available expert"), and I also know that some people assume that LLMs are, by default, better than nothing. Hence my comment.