Where the Wild Things Are was originally going to be called, Where the Wild Horses Are, but Maurice Sendak couldn't draw convincing horses.
But he could draw "Things" (a.k.a. monsters) although they were mostly just stylized caricatures of his own family members.
That he couldn't draw horses in no way diminishes the fact that he was pretty amazing at drawing just about everything else. But it does show how even the great artists have areas they need to work on.
And thank goodness for that, or Max might never have had a wild rumpus!