I kinda get your point, and how you reach your conclusion, but I think you are arguing a very specific and narrow hypotehtical.

It gets unstuck when people are discussing the messy middle of how AI is being implemented. We can achieve amazing harm simply by combining average human behavior and above average resourcing to simulated intelligence machines.

The failure point we recently became aware of was, from one perspective, simply a matter of not securing the sand box.

From another perspective the simulation basically created Enron, replete with methods to avoid detection from regulators and bureaucracy.