My younger brother and sister (and probably my parents) get a little tired of me pointing out the overwhelming number of male main characters in movies, and the lack of a realistic sample of female main characters in books.
I know my sister didn't like it when, after we watched the trailers just before the Hobbit, I pointed out that not one of them portrayed a movie with a female main character. This wasn't a comment on the apparent quality or creativity of the movies (because we were both pleasantly surprised with the apparent originality of Oblivion, and can't wait to see it). This wasn't to say that those movies were somehow evil for all having male leads. All I was saying was that every single one had a male lead.
You know what you say with the main character of your story? You show through who they are, the things they do, the values they hold, the change(s) they undergo, and the consequences at the end of it all what makes a person important, what makes them worth thinking about. And, whatever you say, if you say it often enough, without any notable challenge or alternative, people tend to believe it.