I see your point in user trust, and that's fair, but the same concerns have been prevalent since GPT3 rolled out , that no one would trust these tools to write or edit anything. However, since then users are growing to be more and more attuned to filter and distinguish the quality of the responses (doing invisible A/B testing of these responses), so maybe that's what providers want to capitalize on.

ChatGPT has become one of the top-most browsed websites, and they want to capitalize on it even if 2% of the people actually trust the new integrations.

You can build your own system and set the model temperature to 0.0, then it won't guess or be fancy. It'll present the data exactly.

not to mention the privacy concerns associated with connecting my entire life to OpenAI or Anthropic. If you have the memory feature enabled, it's scary how much ChatGPT knows about you already and can even infer implicit thoughts and patterns about you as a person.

I am sure it already knows a lot regardless of the memory feature, as long you're sharing your chat history/ have your history enabled, but I agree, it'd simply worsen it.