I think it's about user agency. When we say that infinite scroll is addictive, we mean that the user keeps on scrolling even when they wish they could stop. It's also about harm. Trapping users on their phones is harmful to their well-being. A person who wants to quit should be able to do so, addictivity that prevents that is harmful.

Reading the bill I see carve-outs for things like "commercial transactions", perhaps allowing Amazon and Temu to use infinite scroll, but not Facebook and TikTok