I disagree.

Diffusion of responsibility is the main aspect and the other factor is complexity. While AI might scale at will via the number of agents used, humans cannot.

Have you developed a platform which was business critical to the 100.000+ headcount global company that has 24/7 uptime before and after AI kicked in?

After all the amount of decisions to be made accumulate the larger the product or unit you are working on. After all, an AI is a approximation and even automating decisions away means knowing what to automate.

In this high impact and stress situation most people hide. No one wants to be held accountable. No one. That's why you have scapegoats.

Build a SaaS app with 10.000+ customers yourself. This doesn't exist on autopilot. And the moment you see humans fit for whole business units - why stop there? Where does this arbitrary border come from? This doesn't make sense, because why shouldn't AI be able to overtake this function as well?

Complex applications and decisions to be made - they also increase exponentially. And to be honest, this isn't just a matter of AI, but IQ, too. Average people want to execute a well crafted plan - only few craft them on their own or they are basic ones in comparison to huge apps.