"Privacy is both about "keeping things to yourself" and not wanting others to know everything there is to know about you for no good reason, as well as to protect yourself against potential abuses (from governments, but also criminals, unscrupulous companies, etc) that can't be predicted ahead of time."
Yes. To put it succinctly: I may trust the current government to use this data for (mostly) good, but I don't trust all future governments.
A "government" is a big abstract entity that is made up of people and procedures. People come and go, and procedures/regulation are changed all the time without direct legislative efforts.
You don't have the knowledge to know if you trust "that" government or "another" government. The best solution for all is always be suspicious of concentrated power....especially power that involves state-sanctioned violence against you.
Yes. To put it succinctly: I may trust the current government to use this data for (mostly) good, but I don't trust all future governments.