This was about Meta's platforms not doing enough to protect children from sexual material (and allegedly ignoring employee warnings and lying to the public about it), not intrinsically their addictive interface and compelling user experience. I suppose the actions necessary to protect children from exposure to sexual material/exploitation could limit their ability to make certain changes to their platform, eg tighter moderation would reduce the amount of content that could be uploaded, but they could also have just not allowed children on the platform (like how Facebook started) and then not worried about child exploration?