There are valid complaints to the idea being challenged, but it absolutely can be done technically and through legislation enforcing technical controls. Sophisticated users will use VPNs if they want to evade geoblocks, your average person won't (and any business that attempts to help them will be met with a legal hammer), and digital IDs are both reasonable and feasible to deploy at nation scale. Should it be used t…
In theory you could implement age based access controls, but as the article points out, these are full of tradeoffs, and none of them are good. You will either get vendor lock in, violations of constitutional rights, a wider dispersal of Personally identifiable information, or a poorly thought through government implemented solution whose only feedback is additional legislation.
Parental desires to prevent children from seeing inappropriate content is not strictly opposed to individual free speech rights, the need for dynamism and open competition in the marketplace, or a need for privacy and information security. To say these issues need to be balanced would be a false dichotomy. Perhaps the solution is for society to respect parents by giving them the resources they need, through paid parental leave and employment protections.