No need to draw?

Though everyone draws as a child, many remain content to resolve the beautiful and complex human form (their own form) in a few struggling lines and shapes. So the question is: If we all begin naturally to draw, and there are many powerful reasons to draw, then why don’t we continue to draw? Why do we build an educational system that essentially emphasizes the word to the exclusion of the mark? A system that lets drawing’s natural introduction to visual language stop at the stick figure? That allows this language, universal and common to all, to simply wither for all but a very few?