This sort of thing might arguably be useful, but only with local data processing.
I just uploaded recent blood tests and other health info into ChatGPT and then had it analyze what I could do to improve my health, specifically cholesterol and sugar. Then asked it to red team its advice and provide me with one or two things that would generate 80% of the results.
It's pretty awesome having a private doctor that's read every study out there and then can generate advice that will make me live longer and healthier. My doctor certainly doesn't do that. As long as I'm in normal range he doesn't say anything.
But I won't give it constant access to email, messages, calendar, notes, or anything else.
It also suggested eating more fatty fish like salmon 3x per week. And substituting good fats for saturated fat, which is obvious but still very motivating.