Apprenticeships involve ritual. Ritual is a discipline used to focus the student's attention. Many come to believe that the surface rituals of discipline are essential to the art. (Think "cargo cult".)
in reply to Discipline
A monk who has achieved mastery of his art -- an Artisan -- can distinguish between the essential disciplines of their art and the rituals the art is wrapped in.
And besides, who is to say that the sleeping monk wasn't dreaming of doing one-handed pushups while being wacked on the head with by his Zen master?