> Enforcing the law is their duty,

No, that's not their duty, either.

They are a paramilitary force lacking the civilian supreme command that, in the US, the actual military has, empowered by but not obligated to act to enforce the law, an independent and centralized power center.

What laws are worth if they aren't protecting me? I might be unable to protect myself, right? A strong young man may have a physical force advantage over an old disabled woman, right? So the idea is that the police should enforce laws which say it's illegal to harm me, which we're calling "police protecting me"?