Hmm, I disagree. It seems to me that both sources of data are dangerous. Yes, showing "You have 10 likes" is bad for users as social media companies iterate their way towards addiction but your search data is a toxic asset beyond just showing ads. Let's say google leaked everyone's search history tomorrow. How many marriages are going to be ruined? How many politicians are going to resign? How many future politicians will decide to never run? How many firings and never-hirings will there be based on that history?
People should be able to live normal lives without being surveilled - by governments or corporations.