It's not so much defending it, as promoting education. When you tell someone they can't do something, they'll want to do it. It's in our human nature. We're curiosu folk. And if something is taboo, it can add a certainl level of arousal (for lack of a better word) that makes you want to experience it more and more and heightens your satisfaction when you do it.
Porn certainly is bad, has many bad aspects of it, as do many of the subversive ways that humans are sold. For a different example, pick on soldiers, they're told they're heroes, put on platforms, they're part of a team, not individuals, so on so forth. These things allow them to kill with reckless abandon. It shields them from the horrors they're committing because of how things are sold to them. If you want to address the issues of objectifying women, you can do that, but just pointing to porn and saying, there it is. Is not a great way of doing it.
