you do fight to win and if it takes "dirty fighting" that what it takes.
If you talking about fighting to settle some personal issue or defend yourself from attack, or if you are a boxer or MMA fighter whose career and future earnings depend upon winning or losing then yes, that's true.
But studio catfights are different. They are filmed for one reason only - to turn on fans like us.
John, the ECC producer, has said many times at his yahoo group that he tells the ladies before they fight that whether they win or lose is not important - just that they try their best.
Personally, the ones who take that to heart and behave accordingly are the ones I enjoy watching the most. I just find the fights a lot sexier if the girls are not so scared of losing that they resort to tactics like biting and scratching in order to gain an advantage.
Each to their own taste though, I guess. Some fans are turned on by stuff like that, and nobody is going to end up in the hospital after fighting for John. Though I have seen one fight in which somebody would have, if her opponent had been as nasty as she was.