The Lakers nor the Cowboys are going to put a female on the court or field because of the simple fact they couldn't compete. They have a better chance of competing in auto racing obviously, but you still have to have the necessary talent to warrant getting a ride at the top level of your sport, soemthing Danica has never done. Do you honestly believe she'd be where she is now if she wasn't considered in some people's eyes as attractive? Look at the photo on the right in your signature for goodness sake.
Yes, she received more hype last year, but she still gets the most this year. Marco started getting it after he came within 100 feet of winning the Indy 500. Danica is still the only IRL driver that gets interviews outside of the Indy Car circles, she's the only one that garners attention, and she's the only driver that matters, sadly. I seriously doubt she regrets doing those photos, as they are as big for her career as anything else has been up to this point. Combine her arrogance with the fact she's willing to show off her average looks and of course she's going to get attention.
In short, she's a media and IRL sex appeal creation. Sure, it's a neato story to the casual fan that's never watched an IRL race, but when you watch the sport long enough, you actually realize and start to ask, "Wow, why is she here?"