Earlier quoted context omitted.
You can't be careful at all doing this, this is like smoking a cigarette in a dynamite factory. Using LLMs for therapy is so deeply dystopian and disgusting, people need human empathy for therapy. LLMs do not emit empathy. Complete disaster waiting to happen for that individual.
Claudes have lots of empathy. The issue is the opposite - it isn't very good at challenging you and it's not capable of independently verifying you're not bullshitting it or lying about your own situation. But it's better than talking to yourself or an abuser!
Sometimes people indeed just need validation and it helps them a lot, in that case LLMs can work. Alternatively, I assume some people just put the whole situation into words and that alone helps.
But if someone needs something else, they can be straight up dangerous.