Because there's nothing easy about those things, and nothing cheap about building and maintaining a robot that would do them? When you ask the robot to move to

Because there's nothing easy about those things, and nothing cheap about building and maintaining a robot that would do them? When you ask the robot to move to another position on the line because they're caught up and the other positions have a backlog, they don't move, and they don't explain why. Also, when they break, you can't yell or threaten them into operating normally again.