It sure seems like the average person doesn't care that children use Facebook and similar online services. Why should we give more power to state regulators when the public doesn't even want the regulation in the first place?
Whether or not those laws do what they're intended to do is another question, but to say the public 'doesn't care', is a baseless assumption to make.
Parents purposely allowing children to use these services is a much more clear indicator of sentiment, and as mentioned in the article users don't seem to mind allowing their children to use Facebook, Instagram, WhatsApp, etc.
Given that we're no way close to this and the power imbalance is already huge, we should be regulating how every person's data is used regardless of age.