> I personally don’t care who has access to my health data

There's a reason this data is heavily regulated. It's deeply intimate and gives others enormous leverage over you. This is also why the medical industry can charge premium rates while often providing poor service. Something as simple as knowing whether you need insulin to survive might seem harmless, but it creates an asymmetric power dynamic that can be exploited. And we know these companies will absolutely use this data to extract every possible gain.