It was just a random list off the top of my head. I don't think there is anything privacy oriented about blockchains (which publish and store your transactions

It was just a random list off the top of my head. I don't think there is anything privacy oriented about blockchains (which publish and store your transactions publicly forever) or activitypub (which literally publishes your activity to other people). They weren't meant to seem like solutions to humanity's problems. The rest of your post I agree with; mostly that was my point.