There's no way around it. Unless a screenwriter is writing about one-minute section of life where other sexes do not enter, or a world filled with one sex that practices asexual reproduction, men are going to write about women, and women are going to write about men. But can they do so successfully?
This question has been argued for years, flowing through discussions about literature and female-centric moving media. Regardless of theme, men rule the typewriter, and I would venture to say that it's most pronounced in Hollywood. It is palpable every time the screenwriter credit pops on the screen, when Oscar nominees are announced, and even on the picket line, as USA Today pointed out back in 2008. (A post which also notes that women make up less than a quarter of the screenwriters in Hollywood.)
That doesn't mean there aren't female leads hitting the big screen. From Sex and the City to A Mighty Heart to The Proposal, there are women at the forefront -- some of whom are hated, and some who are adored -- all written by men. So the questions become: What makes some men good writers of women? Must they have a "feminine side"? Is there really all that much of a difference? Or is it impossible to truly capture the female experience unless you're living it?