> We regularly show papers for everyday activities - library card for reading books, ID for a hotel stay, driving license for driving a car, ID to pickup a parcel etc.
This is a classic demonstration that "slippery slope" isn't a fallacy.
First you need a driving license. Privacy conscious people objected. You don't need to show your driving license to drive, was the response, only if you break traffic laws or get into an accident. There's no one using it to track everywhere you go or anything.
Then comes the vaccine passport. Privacy conscious people object. Now the response is, hey, you already have to show your driving license if you get pulled over for speeding, what's the difference? And you don't have to show your vaccine passport if you, um, never go outside again.
Meanwhile we now have ALPR cameras recording the location history of every vehicle on the roads. Because some slopes are actually slippery.