Wow, there are a lot of posters who misunderstood my point... I am no jerk :'(
My first assumption is that the white straight male gamer in his 30s is the target. And therefore, the rest of my post. If that first assumption is incorrect, then the rest of my post is invalid.
But I really do think that in this industry, the white straight male is still the most common buyer.
Please do not feel offended just because I said that the first impression should be directed to that buyer! (in an economic point of view ONLY!)
No, not a jerk, just woefully misinformed, and basing a pretty silly set of views and justifications on old and inaccurate information. Also, failing to actually look at the marketing that is out there. BW has chosen to move away from strongly gendered marketing with the DAI cover, and I'll wager they know more about it than you or I. You're behind the curve, here.
Your first assumption, as per the ESA data, is indeed wrong. You can "think" whatever you like about who buys games1. But the data is out there, and would help you form more convincing arguments if you'd only take the time to avail yourself of it and adjust your opinions accordingly.
You also seem to think that competing in an already overcrowded (and underfunded) section of the marketplace when there are more lucrative and less crowded spaces somehow constitutes good business, which (to be fair) seems to be common in the games industry, but that doesn't make it a good idea. There's a strong economic and demographic argument for NOT focussing on young, white, male consumers. Not a fluffy, feel-good social argument; a solid business one.
Gaming is much more widespread than you seem to think, and gamers are much more diverse. You want to tap into that growing market, which is now about as big as the US film industry? Market to a broader section of it, as well as the one you theoretically already have. This isn't rocket science.
1. You say you "think" that most gamers are straight, white and male. I can think my dog is actually an avatar of Fen'harel. And there's fair prima facie evidence that she is indeed closely aligned with chaos and trickster behaviour. But if I start basing arguments on that thought, I'd expect to be handed my hat. The evidence is against me. Evidence trumps thoughts in matters such as this.