Why do we teach them to add and multiply we have calculators? Why do we teach them to read, we have text to voice? Why do we teach them to broom, we have Room

Why do we teach them to add and multiply we have calculators? Why do we teach them to read, we have text to voice? Why do we teach them to broom, we have Roombas? Why do we teach them to do the dishes, we have dish-washers? </sarcasm>