That's not the entirety of the objection. There are paragraphs after that with concerns about how this would be implemented, and it being used as pretext for some awful moves.
This is like when companies pretend the EU made them make cookie banners; no, you could just not track and sell user data.
It specifically says platforms are allowed to have users under 16. They need only "implement reasonable measures to ensure that users under 16 years of age are not provided any addictive feature on the covered platform."