The cameras have categorically not helped with investigation, as is shown time (1) and time (2) and time (3) again. This is just a vibe that supporters like and Flock loves to spin data however it can to support their continued expansion. Also, people do absolutely still have an expectation of privacy when it comes to regular travel, what an insane thing to say.
(1) https://futurism.com/future-society/flock-surveillance-atlan... (2) https://www.forbes.com/sites/cyrusfarivar/2024/02/29/flock-a... (3) https://www.readfrontier.org/stories/tulsas-surveillance-gam...