Well, first, you have to make sure you understand that the "majority" is not a big one anymore. There are some estimates that suggest that up to 40% of gamers are women.
I've played games off and on my whole life. From Atari (I was quite young, but did play with my parents a bit) to Commodore 64 (Hitchhiker's Guide to the Galaxy, anyone?) and all the way on up to PS3 now. I play a whole variety of games too. From Katamari and LBP, which are family friendly titles, to Borderlands, Bad Company 2 and Modern Warfare 2.
I just like games. Period. Can't tell you why, just as I can't really tell you why I'm the kind of girl who doesn't want her boyfriend to buy her diamonds. It's just me.
Speaking towards the "oppression" of female gamers, I think assuming that we started because of a brother or father, or that Wii and Popcap games were our intro is part of the problem. We don't have to be gentled into gaming. But we do want our tastes (which don't always include flowers and the color pink) to be included.
So, to the person tired of the "oppression" threads, give me a break. While I don't want to project a victim mentality (I'm certainly not a victim), that viewpoint is valid. If you're a game maker, a marketer, or you just want to play with some kick butt chicks, then ignoring those kinds of threads is not going to suit you well.