The parent comment was about an accident where you're unable to give any details yourself. Maybe when you're under a truck you'd like your folks to know what happened to you, right? But again, such are implementation details. First let's have that zero trust device, then we can be negotiate who gets to see what and when.

The problem is that it creates a vector for illicit access to the information, and if that vector exists, it will be abused.

I'd rather have society deal with the problems that come with not knowing who's under the truck than the problems that come with state surveillance.