Mainly we're talking about avoiding mass surveillance, not simply about privacy. There's no technical or practical reason to allow mega-corporations to track our every online move.
That's not necessarily true. Both Amazon and Google make a lot of money with search engines and both of them are intentionally doing a worse job now than they did several years ago.
So you won't have a problem telling me your address so I can make photos of you shitting and post them on the internet. Seen as privacy is just a circle jerk.