Correction vs. evaluation

My Tai Chi teacher says: "Don't correct your foot once you put it down. It's the only way to learn to put down your foot correctly at once."
My sketching teacher used to say: "Don't correct wrong lines, sketch lightly and clarify with color. In the end you will learn to put down a line correctly at once."
My saxophone teacher used to say: "Don't stop playing when you go wrong. The band is not waiting for you."
Benjamin Zander says: "Don't wince when you make a mistake. Smile! And say: How interesting!"

Would there be a larger truth here about learning and creativity? It's better to evaluate afterwards than correct all the time...