If AI is good enough to teach math, why not have the AI 'do the math' instead? At a certain point, wouldn't we have to ask whether it makes any economic sense to teach math to the masses?

If AI is good enough to teach people to drive, then it should be good enough to drive the car itself. At that point, it would be pointless to teach the masses to drive when the AI can do it for them. If AI is good enough to cook, ... So on and so forth.

The intention is noble but where does it all lead?