In support of the other reply, here is a look at the supply chain of a very simple product - a can of Coke.

https://medium.com/@kevin_ashton/what-coke-contains-221d4499...

(https://archive.md/PPYez)

The highlighted parts are a kind of TL;DR, but in the context here actually reading it - it is not much - is actually required to get anything out of it for the arguments used here.

Anything technological is orders of magnitude more complex.

Pointing to any single part really makes no sense, the point is the complexity and interconnectedness of everything.

Some AI doing everything is harder than the East Bloc countries attempting to use central planning for the whole economy. Their economy was much more simple than what such a mighty AI would require for itself and its robot minions. And that's just the organization.

I did like "Gaia" in Horizon Zero Dawn (game) because it made a great story though. This would be pretty much exactly the kind of AI fantasized about here.

Douglas Adams hints at hidden complexity towards the end of HHGTTG, talking about the collapse of Golgafrincham's society.

You overlook just one single tiny thing and it escalates to failure from there. Biological systems don't have that problem, they are self-assembling no matter how you slice and dice them. You may just end up with a very difference eco-system, but as long as the environment is not completely outside the useful range it will grow and reorganize. human-made engineered things on the other hand will just fail and that's it, they will not rise on their own from nothing. Human-made systems are much much more fragile than biological ones (even if you can't guarantee the kind of biological system you will get after rounds of growth and adaptations).