No, nothing is "just a tool". Surveillance technology enables all sorts of new attacks. Automation makes things feasible. Cheap storage that allows weeks or months of security footage to be preserved changes what's possible. License plate scanners are "just" a technology that could be done with a bunch of cops on corners with notepads, but in aggregate they're a tracking of where everyone is and has been that could never be done without the technology. Facial recognition is very similar.