The scale and ease of doing it matter. It's like the difference between a bunch of shops having security cameras that they can look at the footage from, versus

The scale and ease of doing it matter. It's like the difference between a bunch of shops having security cameras that they can look at the footage from, versus having every such camera connected to a wide surveillance network with facial recognition and querying abilities. Both are technically just a bunch of cameras in the same places, but not many people would argue it's the same thing.