You have a point as far as ownership of the site goes, but I'm going to strenuously disagree with your second paragraph.
You may not be a picture person, but many of my friends are. We have hundreds of pictures of us doing silly things in silly places, at parties, at weddings, graduations, traveling, etc. This is what we look like as we move through life, and all of them are valuable keepsakes of our time together, and various stages of our lives. Amassing photos is useful and wonderful.
It's also not fair to imply the poster doesn't have friends or a network outside of facebook. He or she may have a great network, but facebook makes communicating with that network easier & more fun. I mean, that's the point, right? There's nothing wrong with that at all.