Sometimes though, those who can paint/draw teach anyway... Burne Hogarth knew the human form, produced some excellent books on the subject, and taught in art school for decades.
But, but Hogarth was a mere illustrator, even a < gasp > COMICS artist! No a "real" artist, dontchaknow. IMNSO opinion, the American artists of the 20th century that will be remembered and studied 200 years hence will not be named Schnabel Pollock or Koons. They'll be named Disney, Rockwell, Watterson, Flagg, Schultz, etc. Those who made the actual icons of the century while the "fine" artists were masturbating for their cronies.