I have never seen automation fully replace the need for human workers. You still need people to maintain the equipment. All automation does is increase the amount of output. And when you start running machines at capacity you find out real quick just how much maintenance they really need.

Robots do get sick, it's called needing maintenance.

Robots also do exactly what you tell them to.

Half of what you say is true. But robots are expensive, in many cases way more expensive than child labours around the world. And while it's possible to have robots do grunt work, true AI is still far away, like several decades.

The kind of sophisticated AI and robotics that can replace a human is much further away than some people seem to realize. That kind of technology doesn’t even exist in a lab. It will be decades before anything approaching that level even exists, and decades more before it’s an affordable, practical, mass-produced option. Even huge corporations that have the budget to invest won’t have the opportunity for quite a while.