> These are government regulations regarding kids.

No, they aren't just that, because they are government regulations requiring everyone wanting access to something that cannot be marketed to children under the rules to prove that they are not a child, which is not inherently essential to a regulation of what can be marketed to children.

There is a difference between regulating what can be marketed to children and mandating that vendors secure proof that every user is not a child.

(Just as there is a difference between prohibiting knowingly supplying terrorists and requiring every seller to conduct a detailed background check of every customer to assure that they are not a terrorist.)