And how exactly do you think the people who commit crimes get to and from the locations? Teleportation?
From my experience, 20 years so far, I have made many more crime arrests from traffic stops than from investigations. When I was a detective I averaged maybe 4 crime arrests a month, when on patrol, probably 10 or more. It's a simple fact, criminals use vehicles to transport stolen goods (including the vehicle), burglary tools, narcotics, and the proceeds of crime.
As for people that whine about getting stopped because they were *only* going 38 in a 35, or *only* parked in the handicapped bay to run inside for 30 seconds - cry me a river - if you don't want to get stopped and/or ticketed, don't break the law - it's that simple.
I cannot comment about the other alleged failures of your local police since for all I know they investigated your information and discovered the license plate was stolen, or was false or something else, but to berate police officers for enforcing laws that don't fit with your priorities is pointless, for every person who doesn't want police doing traffic enforcement, there's another complaining they don't do enough.
KP, you're right, these turbo bass nitiwits will be deaf in short order, which, if you like, is Karma coming back to pay them out.