We only really learn the things we learn when we learn it naturally and
learning shouldn't be difficult.
He does clarify that you might want to learn how to do something but you might not learn it easily because to learn something you need to have understanding. So understanding may take time. That was the best part of the book to me. That understanding can take time.
So maybe Smith is right. Learning isn't difficult we sometimes start from a place of confusion then move to a state of understanding. Now that I think about it, I do that all the time.