If you think preventing and solving crimes, then American police are objectively bad at their jobs. If you think of police as revenue generators, then they're good at it. Because the police spend all their time on things like traffic citations. Even the police unions occasionally say the quite part out loud, like when the NYPD union famously said that they would not arrest anyone "unless absolutely necessary". Unsurprisingly to people that have looked into policing, crime doesn't increase during police work slowdowns.