This isn't about cameras in public. It's clearly established that people can record/photograph the police in public as long as they aren't interfering with them.

This is about cameras in secure facilites, such as in a prison or jail. Those spaces should be subject to some form of public inspection but there's probably a good argument to not allow random cameras in.

Without randomness, things can be easily hidden. That's why random searches too are a thing. Put in notice that "hey there be cameras/inspections at this time in this place" and you find everything in order on the footage, while shenanigans continue otherwise.

There’s probably an argument, I wouldn’t say it’s a good one.

>Those spaces should be subject to some form of public inspection but there's probably a good argument to not allow random cameras in.

Earlier this year various elected officials tried to perform exactly that kind of public inspection of ICE facilities and met a lot of resistance. I know that some subset of these were just publicity stunts, but despite that, the fact remains that the public needs to be aware of what detention in those facilities is like and if the DHS makes choices that result in random cameras being the only way to do that, then they should reap what they sow.

>there's probably a good argument to not allow random cameras in

you're right. there's also an awful lot of very obvious good arguments for allowing recording and public access to recording, such as the incident where a prisoner was locked in a scalding shower until he was so badly burned that his skin "fell off at the touch" (https://en.wikipedia.org/wiki/Killing_of_Darren_Rainey). Like so many incidents of its kind, there was absolutely no hard evidence available to prove what happened and it ended up being yet another case where someone died horrifically and officially no one was found to have done anything wrong but several million dollars did change hands. If prison guards are torturing prisoners to death and getting away with it, the argument that they don't need surveillance needs to be a whole lot better than "probably good".