This is normal most places (in the US, at least) AFAIK. Cops don't really investigate property crime unless it's very serious (I know for a fact that several tens of thousands in stolen goods via a break-in spree at multiple businesses isn't enough for them to put forth any effort, in my very-much-not-SF city) or someone with connections was the victim. They're like "OK here's your report for insurance, bye. No, stop trying to show me a list of places the culprit and their car's plates were assuredly caught on camera, I don't give a shit. Bye." Anyone who's been through this once already only bothers to report anything if an insurance claim will be made, since they know the cops won't do anything even if there's a very high likelihood they could track down the culprit. Unless they catch them in the act, nothing's gonna happen.