idea sis one in a million but not this one

[Nektonic]

Anecdotal evidence that Lucas or Scorsese "can't spell" or that Spielberg "cannot draw" are very incidental footnotes in the biographies of their larger works. By the time the later was making laughable stick figure storyboards for Raiders, he'd already (and almost single-handedly) invented the summer blockbuster.

Even for lesser known or up and coming directors, it doesn't matter whether they can draw or not. Some like Ridley Scott and James Cameron can, while others like the Wachowski brothers can't draw to save their lives, yet they made one of the most visually innovative big budget films of the last 10 years.

Hell, some directors might come from the theater and don't know squat about cinematography, they are masters of character and storytelling. The DP will then help these directors find the appropriate look for the film.

It is good to be as multi-talented as possible, but at the same time proficiency in the core skills in any department/position are what's really important. The bottom line is that if the director can't draw they hire someone that can. In the grand scheme of a Hollywood film, a storyboard artist is dirt cheap. Same thing with a screenwriter.