Your first paragraph describes Instagram's algorithmic feed or YouTube suggestions just as well. The original sin IMHO is not killing algorithmic feeds in the crib with regulation. I don't get how companies can continue to claim immunity from liability under section 230 when they actively curate user feeds to maximize their commercial interests.
When you put this limbic weapon in the hands of a communist regime, incredibly bad things will happen. Facebook at least had some backlash over manipulating their users mood using their platform. It’s not hard to imagine China attempting some fairly subversive things with TikTok. I would never sign up for it.