Surely someone claiming it's arguable should be willing to make that argument.
For me it's not that it's reproduction. Film that shows sex is not an issue as I see it and I don't know anyone that has developed serious addictions to sex in Hollywood film. However I know several people, family members included, that have absolutely obliterated their childhoods and early adult years by becoming addicted to porn. They were groomed by adults online from a young age and, although their parents tried to stop it, kids are sneakier and they got around it, exposing themselves to some truly dark things. It is not easy for families to recover from having dealt with a child with serious addiction issues.
I think it's pretty silly to argue that systemic protections are ineffective and overreach whereas the efforts of one or two parents should be enough and are the correct level of enforcement for the protection of children. The parents of the people I know went to extremes to protect their children and they were mostly unsuccessful.