"In public, it is no threat to freedom to be observed at any time by any means — so long as such observation does not become a political weapon."

You mean so long as power doesn't tend to corrupt? Have you looked at China's "social credit" thing? We're 37 years past Big Brother.

There is no important difference between liberty and freedom, least of all the degree of privacy. Certainly, we can argue about how much privacy can be allowed in a viable society, but there's no point in trying to put labels on the mix of autonomy and privacy, as if it were the temperature-humidity index.

I have seen liberty contrasted with "license," the privilege to defect in society's coordinated plus-sum undertaking - essentially freedom without responsibility. That seems to me a useful distinction. But a distinction based on privacy per se and the words you have chosen to implement it don't work for me.