So you are projecting sociopathy on those that choose to keep their lives more private than you? Like you said, basic personal details are essentially public knowledge anyway. Where do you draw the line personally on what should be private?
Boundaries - yes sure they exist. I don't have my photo albums open to the world. I don't share info about family and friends - I know people by default don't want to share information about them, and I try to respect that. Don't share anything on Facebook, where plenty share, for example.
At the same time, I find obstacles to data sharing codified in the UK law frustrating. With the UK NHS. 1) Can't email my GP to pass information back-and-forth - GP withholds their email contact; 2) MRI scan private hospital makes me jump 10 hops before sharing my data with me; 3) Blood tests scheduling can't tell me back that schedule for a date failed, apparently it's too much for them to have my email address on record; 4) Can't volunteer my data to benefit R&D in NHS. ("here are - my lab works reports, 100 GB of my DNA paid for by myself, my medical histories - take them all in, use them as you please...") In all cases vague mutterings of "data protection... GDPR..." have been relayed back as "reasons". I take it's mostly B/S. They could work around if they wanted to. But there is a kernel of truth - it's easier for them to not try share, so it's used as a cover leaf. (in the worst case - an alibi for laziness.)
I'm for having power to share, or not share, what I want. With Google - I do want them to know about myself and use that for my (and theirs) benefit. With the UK gov (trying to break encryption) - I don't want them to be able to read my WhatsApp-s. I detest UK gov for effectively forcing me (by forcing the online pharmacy) to take a photos of myself (face, figure) in order to buy online Wegovy earlier today.
For UK - I'm reasonably sure some people will have died because of the difficulties sharing their data, that would not have died otherwise. "Otherwise" being - they could communicate with the NHS, share their data, similarly via email, WhatsApp etc, to how they communicate and share data in their private and professional lives.
People at personal level have a fairly reasonable stance, in how they behave, when it comes to sharing their data. They are surprisingly subtle in their cost-benefit analysis. It's only when they answer surveys, or talk in public, that they are less-than-entirely-truthful. We know this, b/c their revealed preferences are at odds with what they say they value, and how much they value.