Is that foreshadowing of ChatGPT redirecting users to ChatGPT Health in some way? Base product no longer answers everything, now I need to pay an add-on fee to talk about health related things?

I doubt it. It's probably a CYA thing. There are a whole bunch of hot-button topics ChatGPT won't talk about, not because OpenAI will ever try to monetize them but because they're fodder for lawsuits.