I think this would be better phrased as "... legal shield to websites that only want to show certain content to its users."
"[S]ociety-wide manipulation of information" would imply that everyone gets their news and information from Facebook, Twitter, etc which gets linked directly into their brain regardless if they want it. These giant tech corporations aren't holding a gun to anyone's head - they all started with zero users and they will end when they have zero users.
If this is what "most people" are unhappy about, just wait until they read the TOS and realize what else they agreed to.