if you want to tackle the POV of the true believers at Y Combinator*: look, flock can't be that effective if all it takes is a guy with a ladder to defeat it, right? same thing with pervasive facial detection, you can wear a mask. you don't have to go into all this philosophical stuff to see how the promises will not be fulfilled.
*Garry Tan has been characterized as a True Believer, in that he sincerely believes Flock's vision will reduce crime and not be misused. on the flip side they don't invest in Palantir, Anduril, Applied Intuition, etc. or other defense stuff. so it's very exceptional for them.