As a child, you learned to talk. You learned to walk. These were quite natural. No one had to teach you. There was no formal study. You wanted to talk. You wanted to walk. No one had to tell you to move your lips and tongue in a certain way to form sounds. You did not have to consult a dictionary. No one had to tell you that when you walk, you have to want to and then you have to move one leg from the hip and then the other. You didn't need such instruction. Instruction might well have hampered you.