It’s possible I just haven’t come across those types of comments you’re making fun of, but I usually just see people making the case that we don’t need new, possibly overreaching, legislation to handle these situations. They want to avoid a disingenuous “think of the children” kind of situation.

a youth court in the city of Badajoz said it had convicted the minors of 20 counts of creating child abuse images and 20 counts of offences against their victims’ moral integrity

I’m not familiar with their legal system but I would be willing to bet the crimes they’ve committed were already illegal under existing laws.