Earlier quoted context omitted.
So you're implying alcohol and cigarettes should be sold to children? (Not to mention all the other consent age laws.) That said, VPN is a national security issue, children are only a pretext.
What does national security even mean anymore? People are using this term for basically everything these days, as if saying "national security" is somehow a justification on its own. What "national security" implications are there with VPNs?
"Foreign agents" communicating in an untraceable way.
All internet communication is wiretapped by default unless you use a VPN to a rival jurisdiction. (Where it's also wiretapped, but presumably the interplay of state actor interests comes up in the "foreign agent"'s favor.)