For this kind of tool to be useful it basically has to be able to impersonate you digitally. I know I personally have zero trust for Meta to do this securely and without exploiting me, whereas Google I feel a lot better about here. After all Google has made a business out of safeguarding data with gmail, drive, etc. Same with Microsoft and Apple. Meta, OpenAI, not so much.
On the other hand, I’m always surprised how little many seem to care about data privacy.