This is exactly the same argument of targeted surveillance vs mass surveillance.

Saying "humans have spied on each other for centuries" is nothing but a distraction for how far beyond what should be legal mass surveillance is, because it makes it so easy to have everything on everyone all the time. It's nothing like pass targeted surveillance. If anything it's much more like Stasi-style surveillance, but on a much bigger and more indepth scale. And we already know how dangerous such surveillance is with the wrong person leading a country.

When war becomes easy and cheap (to the attacker), you'll just end up having more of it. It doesn't help the the military industrial complex constantly lobbies for it either.