The point is that every human has the ability to disobey, tempering pathological behavior, whereas AIs can be directed en masse by malicious actors. By commoditizing intelligence, they concentrate power in the hands of the rich.
No system is perfect, but I read the whole thread as needing more AIs having a different goal in the chain and be able to ignore the orders they received.
I'm not in the field, but that sounds like something we're probably studying for decades at least, with possible solutions that could be applied efficiently.