Its all about the security theatre.
If they really have "more cameras than anywhere else" and if that even mattered, then its already covered.
It would be orders of magnitude cheaper to put cameras in every single room, with a big sign saying this camera turns on every 4 hours with a big red light, and then if you cover it up a physical presence will occur.
Instead they go with: SHOW ME ALL YOUR USB DRIVES. Same shit as covid, if you make it normal for "officials" to touch and make copies of everything all the time everywhere, then there is no such thing as crime anymore yay