It isn't gaming culture as a whole, which is 50% female these days.
Same old bullshit. Including in those stats are people who's extent into gaming is buying Angry Birds on their smartphone or playing Farmville. Those women in general don't play shooters, don't buy the next gaming console, don't update their PC to play games, and don't read gaming journals. Anita is critiquing games that are catered to men, because that's their demographic. And she does so in completely unequal fashion, having no qualms when men are portrayed in sexists ways.
She is, of course, just a con artist riding the wave of feminism and video games while reading scripts for McIntosh. That was Jack Thompson's biggest mistake, not getting a female spokesperson.
Of course it doesn't have to be - look at games like The Last of Us.
Uses the zombie trope. Uses the young-girl-in-distress trope. Uses the poor, innocent daughter gunned down trope. Wow, I'm so glad we have you and Anita to save us from all these horrible, gritty, sexist tropes.