I don't really see any policing, I would call it keeping parts of the world unstable and having select corrupt regimes in power. All in order for multinationals picking up resources. Not really any true benefit for ordinary Americans, as well.
Discussion
The policing is mainly just the navy and shipping channels. Without the deterrance of navy seals taking out pirates, we will see way more piracy
The second part I mostly agree with. The instability we allow or create in the middle east is mostly on Israel's behalf. As for the global south countries with resources I'm sure they prefer a dictator/centralized power that they can pay off for access to those resources