Police aren't designed to "fight crime" - or keep people safe. They are designed as a counter-insurgency force against set populations.
"More notably, researchers analyzed the data to show how officers spend their time, and the patterns that emerge tell a striking story about how policing actually works. Those results, too, comport with existing research showing that U.S. police spend much of their time conducting racially biased stops and searches of minority drivers, often without reasonable suspicion, rather than “fighting crime.”'