>the more of them you add, the larger is your communication and coordination overhead. In no small part because humans are self-interested agents that simply aren't designed to compose their capabilities seamlessly.
What proves that AI doesn't have the same limitations? There's only so much computation you can do in given space, and all communication is limited by universal speed limit.
What? Humans are made of sloppy wet meat. Brains are nowhere near brushing against the physical limits of computation, speed of causality or others, in any way, fashion or form. You need to put a lot of intelligent design on the table before you even start getting close to those walls.
Which doesn't bode well for the future of human intelligence. Computing hardware gets better at what it does generation to generation, but no one is about to release Human Brain 2.0 any time soon. Human mind is not a fast-moving target.
Principal-agent problem isn't a physical law. It's a limitation that AIs don't have to suffer from. Humans have to delegate to other humans - but for AI, "principal" and "agent" might just be the same exact system instanced twice.
What proves that AI doesn't have the same limitations? There's only so much computation you can do in given space, and all communication is limited by universal speed limit.