Totally agree on barriers. If I could find a therapist who's a good fit, at a reasonable price, I'd gladly hire them.
But even in that case, I struggle to see how it's possible to have a deep connection with them. My life is their 45 minutes; it's just not possible for two humans to achieve given those constraints.
I'm guessing by attack surface you mean conversations will be turned to ads, right? Do you think that's a possibility given the intense competition between LLM vendors, including self-hosted options?