Nah, I saw some kids stealing a bike in town the other week, and they did it in a few seconds maybe 3 or 4 metres from a security guard. Smart kids, they acted in the moment I walked between them and the guard with pit crew-like efficiency - two steadying the bars, one cutting and removing the lock, and the last getting on the bike - so by the time the security guard called out they were already riding and running away. You can steal a car fast, but not that fast, and not in the middle of a crowded city centre.
The cops definitely don’t give the slightest shit, but it’s not the only reason.