As I said above, if women want more positive portrayals of women in video games, they can start their own game companies and make their own games (and some have done just that, I applaud them for their effort)
This post is a good example of blame shifting. By shifting the blame of sexism onto women who haven't made the non-sexist games, you think you can claim your hands are clean, right? So what do you say: "let the market decide! If sexism is bad then it will be uneconomical. We don't have to worry about that annoying subject called ethics." Heck, let's apply it in general. If LGBT people don't like negative portrayals in the media, they can just form their own media companies. If African Americans don't like racism, they can make their own media.
What a great idea...NOT!
Here's an alternate idea: assume that women are complete human beings and that sexism is wrong. And even if you are a man, realize that you probably have a sister, daughter, or niece who will see this sexist crap and see it as a red flag to stay in her assigned gender role...or else!
Sexism is a type of bigotry. I know our culture has made it seem less damaging than racism, but really it is just as damaging. Just because sexism is largely accepted does not make it right.
Here is a list of bigoted statements:
* If those n*****s want to play golf, they should just build their own golf club
* If those f**s want equal rights, they should move to San Francisco
* If those b*****s want to play our sexist games, they can start their own game companies
Yeah, I know, sexist video games aren't the greatest form of bigotry that exists. But it is a type of bigotry. And it should be resisted.