Like security, the Internet doesn't tolerate half measures. You either have perfect privacy or none.
A lot of our intuitions about both are based on obscurity: nobody is interested enough to devote their lives to you. That's not the case any more. You are exposed to every person on the planet, and they have the tools to automate attacks on every single person.
That's not to say "give up", but we need to find a new understanding of how our lives work. It's like we're all hunter-gatherers who find ourselves instantly in the largest and fastest city, with nobody to teach us the ropes.
Which is kinda interesting because the only people I know without any internet presence are very old or, working for intelligence services.