This isn't about LLMs, it's image generation. And it's also important to note that these are still just accusations, and anything child porn related is going to have a lot of angry people insisting that there are no shades of grey while disagreeing on where that supposed hard line actually lies.
Finally, the researcher behind this has stated that he opposes the existence of these AIs regardless of the child porn issue, so I have some dubiousness there as well.
But this is the internet, so let the angry arguments roll on I guess.