Growing up Geek - and Girl

Why is it important to put women on the covers of science fiction and fantasy novels, and why is it important to make sure they're not represented in a sexualized or diminishing posture? Why is it important to ensure that there is more than one woman in the main cast of a film or TV show? Why do people care so much about the Bechdel test?

And why do we keep having these arguments? 

Haven���t we geeky women done enough to prove that we like Star Wars and Star Trek and action movies and Asimov...