Have you ever tried calling your brokerage firm, if you own any stocks or a 401k, to ask them who owns the actual shares you purchased?

$10 says they won't give a straight answer unless you ask just the right question. Eventually you'll find that there isn't a share you own directly, its effectively an IOU claim to a share. People can technically learn how the system works, but that leaves a lot of gray area there.

We could also technically read medical journals and learn how our medications work, but its unreasonable to expect everyone will and recent history has shown that in a pinch you'll be called out for doing your own research and thinking critically.

I'm sure I wouldn't understand their answer, even if they would give it to me 100% truthfully. In fact I just recently learned about the share IOU thing you mention too. And I'm somewhat interested in the topic too, so I too think that people in general understand it even less. Same for medication.