We're long past that point. Many (most?) Western governments ban simulated CP, including non-realistic stuff like cartoons or even purely textual descriptions.

Some go further still. E.g. in Australia, "laws also cover depictions of sexual acts involving people over the threshold age who are simulating or otherwise alluding to being underage, even if all those involved are of a legal age."

Maybe if it were the creation of child porn that were illegal but that's not how the law is written.