Not universally true. Different places have different laws about this.

No expectation of privacy (arguable, but okay) doesn't imply it's OK to build mass surveillance infrastructure there.

Maybe you should be entitled to some respect for your privacy in public, though. Indeed in some places you are today. There is no good reason to extrapolate from the natural situation that "If you go out then someone might see you" to the entirely unnatural "If you go out then you should be subject to arbitrary surveillance, recording and analysis by unknown parties who also have access to unknown additional data about you for unknown purposes."

No expectation is different from your information being automatically stored and analyzed (and easily traced back to you whenever the government feels like it).

So you're fine with your everyday movements logged and published online? After all, to go anywhere you'll need to step public roads, so you have no expectation of privacy.

Actually, I do.