Not every game needs to needs to be culturally signicant, just like not every movie needs to be a dramatic contender for an academy award. Sometimes its great fun to sit down and watch things explode in the latest Michael Bay explosion filled popcorn flick, and to me, thats the sort of position Mortal Kombat holds as a game.
And I don't mean that as an insult, I love action movies, and I love Mortal Kombat, my point is it can be great without having to weigh in on the "games as art" issue or be a genre defining, culturally significant masterpiece. Yes I think games are as much art as a film is art, and I think there is a definite place for real, serious, mature, dramatic games that can have real impact and depict real people dealing with real issues. Take Heavy Rain for example, absolutely BRILLIANT game, and the sort of game I would want to be using as an example in a "games as art" debate. Mortal Kombat, not so much. Just like with films, I loved The King's Speech and The Social Network, great films the both of them, but I also loved Jackass 3D
Not every game has to clean up and act respectable, theres plenty of room for games that just want to have a laugh and be a bit disgusting/disrespectful/silly/excessive. I'm sure Mortal Kombat isn't trying to make a statement on society's perception of females (as someone else pointed out, the males are just as equally exaggerated in many cases), its just having a bit of fun, its a Michael Bay or Paul W.S. Anderson film, not an Oliver Stone or Michael Scorcese film. I don't think they're particularly interested in having Sonya Blade be an authentic recreation of a woman in the special forces, they just want to make a fun, slightly naughty, slightly silly, very cool game. And really, thats fine, just enjoy it for what it is and stop obsessing about it quite so much I reckon