It’s really easy to say that but I have heard of no viable proposals to actually replace the police with “something better”. Nor do such proposals ever elaborate on how the new system would operate without vagaries and wonderful nice-to-haves like unconditional free housing for the homeless and UBI. It’s extraordinary easy to say a hypothetical system would be better. But how do you actually implement it?
I also think those brutish types you mentioned from high school might be the only kind of people willing to accept the dangers and anti-social elements that officers have to put up with. If you thought working in retail was bad, the kinds of people the police have to deal with are in a league of their own.