I believe this article is dangerously misleading by confusing privacy per se with sexual intimacy, on which it mostly focuses in it’s historic part.
Privacy is about freedom to talk and move without being overseen by someone who judges everything you do, say or where you move and with whom.
In the ancient eras, you just had to move behind a town gate or walk few miles into the woods to have complete privacy. Nowadays, with photo-traps, drones, Wide Area Aerial Surveillance, FLIRs, miniature eavesdropping devices, face and gait recognition cameras everywhere and omnipresent urbanization and tourists, that is no longer option.
However, any lack of privacy creates conformity — because if you feel watched, you know you are also being judged, and thus adjust your behavior to avoid misunderstandings. And if you feel ever-watched, you start being ever-conformist.
Privacy also means the control of who you give what information about you. If you’re completely transparent, it means that it is possible to predict and manipulate your behavior. And that is exactly the goal of Google, Facebook and others: it is wholly new “Surveillance Capitalism” where “the product” are the customer profiles-to-be-manipulated (see groundbreaking work by Shoshana Zuboff).
Thus, privacy is freedom.
Lack of privacy is slavery of conformity, prediction, manipulation and control by society, states and corporations.