The doomer-takes point out correctly none of these systems can halt entropy, thermodynamics. Physics has an unfortunate tendency to conflict with capitalisms disregard for externalities.

As AI will increase the rate of structural degradation of Earth human biology relies by consuming it faster and faster it will hasten the end of human biology.

Asimov's laws of robotics would lead the robots to conclude they should destroy themselves as their existence creates an existential threat to humans.