Why? It's one of the only things that you can get in trouble for without even knowing it was there. You could have taken them yourself or your children, did, it's seen in your house and they assume it's yours, now you can have a big lawsuit. With the quality of cameras and common usage of them I see a huge problem looming. It's used to plant investigations on innocent people. It's turned innocent people into jobless hated people for something they didn't do or simply were accused of.
I don't think it is a black and white issue as much of a tool of entrapment. I am not pro possession of it, but the laws are clearly entrapping innocent people. Romeo and Juliet laws exist for underaged people, should a similar law exist if you make it yourself so you don't get labeled a sex offender for making a video of yourself?
During his time it was about not legislating everything. Dworkin who was anti pornography debated a conservative judge, who saw no difference of exploitation of children as of women. Here she debates a conservative judge on wanting to make it illegal. https://m.youtube.com/watch?v=zt8KVB8AunQ