
Because their “spying” still had a few pretty hefty checks and balances. Police couldn’t just track you without a warrant and cause, any information about you had to be acquired through different channels. Flock cameras are a private company that works directly with the police meaning they don’t need to have a warrant. Plus they’re actual tracking cameras.
Which they can’t use in court because that would be illegal, so even if they did all it can do is create some very shaky probable cause, unless they want to go full black ops on you but honestly I’d be impressed if it got that far. However they are trying to put in new laws that WOULD give them legal backdoors.