It seems that the author prefers to ignore the fact that, throughout history, apprenticing has been reserved for the common people, while teaching was reserved for their masters, the rich and the powerful.
Having both is better, but at some point you need to learn the theory.
I think even more so apprenticeships were for skilled workers or somewhat "middle-classes". Majority that is farmers well either you worked with your parents or seek employment from someone else in various farming jobs. Sure they trained you to do that, but it was not so much complex jobs but labour.
Having both is better, but at some point you need to learn the theory.