What's worse is that there are privacy-respecting alternatives available out there, all for free or close to it.
For search engines, you can use startpage.com and duckduckgo.com.
For social networks, you can use Diaspora. You might have to pay for a cheap hosting account though.
For phone operating systems, you can use LineageOS (formerly CyanogenMod).
For PC/laptop OSes, you can use Linux.
But no one wants to bother with any of these things. They'd rather use whatever's mainstream, and they're perfectly happy to post all their private information on Facebook for the whole world to see.