SSRN is a kind of vast warehouse of academic papers, and one of the most ~~excited~~ cited and well-read ones is called "I've got nothing to hide and other misunderstandings of privacy."
The essence of the idea is that privacy is about more than just hiding bad things. It's about how imbalances in access to information can be used to manipulate you. Seemingly innocuous bits of information can be combined to reveal important things. And there are often subtle and invisible harms that are systematic in nature, enabling surveillance state institutions to use them to exercise greater amounts of control in anti-democratic ways, and it can create chilling effects on behavior and free speech.
Suppose they start out entirely benevolent. That commitment must be perpetually renegotiated in upheld over time. As the landscape changes, as the profit motive applies pressure, as new data and technologies become available, as new people on the next step of their careers get handed the reigns, the consistency of intention will drift over time.
The nature of data and privacy is such that it's perpetually subjected to these dynamic processes. The fabric of any pact being made, is always being rewoven, first with little compromises and then with big ones.