It seems like people here have already made up their mind about how bad llms are. So just my anecdote here, it helped me out of some really dark places. Talking to humans (non psychologists) had the opposite effect. Between a non professional and an llm, i'd pick llm for myself. Others should definitely seek help.
When I was getting my Education degree, we were told that, as teachers, to take talk of suicide by students extremely seriously. If a student talks about suicide, a professional supposedly asks, "Do you know how you're going to do it?" If there is an affirmative response, the danger is real.
I suspect that comes from examining case studies?