Not exactly lore.
We don't judge a fictional character to be crossing a line based on their creator's story,
when judging an animation to be immoral, we look only at what we can see.
Say, if the animation depicts sex with a group of pre-schoolers and the creator says they're actually 609 years old, it's still wrong because you can't see that they're 609 years old and in a normal human society, pre-schoolers are children.