When I was younger, I held the "nothing to hide" PoV. But now I think about it more critically, like "how could [...will!] these surveillance powers be misused/abused?"
That's sort of what I realized the first time I got into a power struggle, and learned all the ways people can try to frame you for things, slander you about things, and otherwise set you up.
Knowledge is power.
Knowledge asymmetry places you at a disadvantage, always.