You're not negating what I wrote, there definitely needs to be a follow up once the perpetrators are identified, not to mention other approaches like funding the police. I'm no fan of the Chinese government, but they do seem to have something going there. Not to mention countries like Singapore, the UAE, etc. where there are harsh punishments, and much better safety overall compared to the US.
Again, it's a tool in the tool box, necessary but perhaps not sufficient.
There's a particular rock in the Atlantic off the coast of Europe and East or Ireland that's been carpet bombed with CCTV cameras. Ask anyone who lives there and they'll tell you that they're still waiting for the reduction of petty crime the cameras were supposed to bring. There always seems to be plenty of money to fund more cameras and more surveillance but never any money to fund the Good Old Fashioned Police Work(TM) needed to follow up on all the crime those cameras see.