Yea, that's the thing: I could
almost get behind mass surveillance if it
actually solved crime. Probably not, but almost. But it doesn't! Having a camera on every street corner doesn't do anything to solve crime if the police won't look at it and actually follow up. So we get the downsides of mass surveillance without any upside.
Same thing with things like "find my iPhone". Great in theory, but if your phone actually gets stolen and you tell the cops "Hey, my phone is at this exact address, I can prove it with Find My," they still don't give a shit and don't lift a finger to solve it, so the technology is in reality useless.
We need a police force who is actually motivated to solve crime rather than just find black people to beat and show up in force when someone protests something.