The whole "maybe if the homework can be done by a machine then its not worth doing" thing is such a gross misunderstanding. Students need to learn how the simple things work in order to be able to learn the more complex things later on. If you want people that are capable of solving problems the machine can't do, you first have to teach them the things the machine can in fact do.

In practice, compute analytical derivatives or do mildly complicated addition by hand. We have automatic differentiation and computers for those things. But I having learned how to do those things has been absolutely critical for me to build the foundation I needed in order to be able to solve complex problems that an AI is far from being able to solve.