If I were him I'd stand by that defense. It's a carefully worded and sane defense. He's not defending child abuse, he's saying, extremely clearly and plainly, that possession of evidence is not the same as committing abuse, and that the law shouldn't use possession as a scapegoat. Which, given that every attempt to censor the internet in the last 10 years has started with "protect the children", I'd say he was trying to cut that tactic off at the head.