Is "almost everything" a bit strong? Should I have specifically mentioned BPD and schizophrenia (which I though were the two exceptions I thought people would most likely mention, there's bound to be a few others).

I coild argue that DBT is kind of just a variant of CBT, and while it's generally got evidence of being more effective there's credible sources suggesting CBT is effective (even if it's not quite as good). But nah.

I know there's exceptions. I said there's exceptions.

Can BPD even be treated with talk therapy? That's all LLMs would be used for afaik, it's not ever going to have a long term plan for you and check in