What It Really Means to be a Director

So there is this article on how "important" the director of a film REALLY is.

I didn't know that:

• Directors aren't that important after all! They're still important but, not as important than other staff members.
• The director's job is to basically shape the vision of the film.
• The directors are the biggest talkers. xD

I thought that the article was interesting! I think it's funny how the director isn't as important as other crew members. I also like how the actors are the ones who take the MOST blows.

My one question is why are the writers somewhat underrated?