Yeah, definitely no magical thinking here. Nothing is free. Computers cost money and energy. Infrastructure costs money and energy. Even if no human is in the loop(who says this is even desirable?), all of the things you mention require infrastructure, computers, materials. Meaning there's a cost. Also, the idea that "AI law enforcement" is somehow perfect just goes to illustrates GP's point. Sure, if we define "AGI" as something which can do anything perfectly at no cost, then it has infinite value. But that's not a reasonable definition of AGI. And it's exactly the AI analogue of a perpetual motion machine.