I would like to hear the numbers behind your arguments. I would be very surprised if highly degrading porn is more popular compared to amateur or gonzo. Simply because it exists does not mean it represents a popular trend emerging in pornography.
You seem to believe that women deciding to be dominated sexually must be subjugated, and that her choice is a result of the oppressiveness of our society. Many women would find that view very offensive.
I actually agree with your first part, and as I said, its an increasing trend, not necessarily the most popular. But that still worries me.
But I disagree when you say women deciding to be dominated. I don't see how one can decide to be dominated. If we follow this argument that we can say that men and women in a China factory decided to work 16 hours a day, conveying the idea that there is nothing wrong with it.
You seem to believe that women deciding to be dominated sexually must be subjugated, and that her choice is a result of the oppressiveness of our society. Many women would find that view very offensive.