The author of Homo Deus compared us trading our private data (conversations and likes etc.) for free online services to native americans trading their land for some beads and guns from the settlers. It's not about privacy, it's about control.
The author said Facebook has done studies that it can predict your responses better than you or your friends with only data from 10 likes. I didn't look it up, maybe the exact number is a bit off, but it doesn't matter, these services have thousands or millions of data points on us, they will definitely know us better than we know ourselves.
Lexus has even started getting computers to write their ads.
So, I think rather than debating about privacy we'd should be debating who made a worse deal, land for beads or data for photo sharing capabilities, which not only give them unprecedented powers of persuasion but are also leading to a lot of other problems like screen addiction and depression and isolation.
Whatever you do, please don't buy those smart speakers that are always listening.