Liberty is given up in inches, not miles.

The offenses of a regime at its apex would've led to it being stopped had they started out that way, but they didn't.

What you've hit on is the basic problem of treating privacy as a means to an end though: no level of it protects you from fascism, but it is a means by which fascism can be opposed - in many cases at personal cost to yourself.

In theory I have no secrets, and the contents of my phone or life if public would be of no consequence to me. In practice, when the regime starts flustering itself that I have no secrets for them to reveal the hopefully people will oppose it - or I get a decent warning that it's time to bail.