No, they exist to help keep society civil. The problem is that elites with influence and money are able to leverage those things to convince cops to work against the interests of the community. But the purpose of cops is and has always been to ensure civility and the adherence of common law. Without police (or in situations where police are prevented from acting) you get situations where crime starts skyrocketing and shit starts getting really bad, we know this both historically and can look at prime examples happening right now with Portland, New York, and Milwaukee