That section in the GPDR didn't reduce tracking, it just added banners, and its removal would make the banners go away.
Legislate the behavior you want to see, not the behavior you hope will be a side-effect. You can't say, "the law is fine, it's the children that are wrong" when sites responded to the incentives they were placed under. The system finds an equilibrium at "everyone keeps doing exactly what they were doing before, just with a banner" and that's entirely the fault of the law. The incentives even go to far as to punish defectors because anyone who does right by their users loses money.
Legislate the behavior you want to see, not the behavior you hope will be a side-effect. You can't say, "the law is fine, it's the children that are wrong" when sites responded to the incentives they were placed under. The system finds an equilibrium at "everyone keeps doing exactly what they were doing before, just with a banner" and that's entirely the fault of the law. The incentives even go to far as to punish defectors because anyone who does right by their users loses money.