Unsure about this. Perhaps there were no secrets in foraging bands. If you told one person something, probably everyone else would know by the end of the day
But your own privacy: in what part of the woods you went for a walk by yourself, how much grain you had tucked away in the corner of your one-room shack behind the firewood, how many coins you might have earned by selling hemp knapsacks to passers-by - noone would know that stuff. And that is the sort of privacy that is being taken away from us.
They know where we are, they know how much money we have, and now they want to digitise our money I to programmable tokens so they can control where we spend it.
We have decreasing levels of bog-standard privacy