> But I think you’re also saying that police can’t change a local community, if it’s already filled with crime. If that’s the case and they don’t have a big impact… what’s the point?

The point is to preempt a power vacuum threatening social order, e.g. imagine if Japan didn’t have a police force.

> Plus, I’d say the “hysteria” is more about police turning gold into lead, so to speak, harming or killing people unnecessarily.

I don’t disagree, nor did I claim to. However, I’d be curious to know whether you’d prefer all police be replaced by robots and drones which perfectly upheld the law. For many, that’s an even scarier thought than imperfect, human policing.