You can't just buy one on the dark web because the credential is tied to a private key — you'd need the actual device or key, not just the token.
A government-issued cryptographic credential lets you prove you're a real adult citizen without revealing your identity. It eliminates bots and foreign actors, protects children, and preserves privacy — because the government only gets involved once at enrollment, and platforms never see who you are, just a yes/no proof.
(I'm not an expert, so if anyone has input please correct)
EDIT:
The one-time government verification moment is a major privacy chokepoint. Who runs it? How is that database secured? History is not encouraging here -- government identity databases get breached, misused, or quietly expanded in scope. "The government only gets involved once" is doing a lot of work
That's like saying the simple solution to global warming is for people to not burn fossil fuels. It ignores the conditions that led to this becoming a problem in the first place; and it ignores the power of entrenched industry to protect their own interest.
What we need is political reform. so that the bodies that are supposed regulate industry and serve the public are empowered to make the necessary reforms. Lina Kahn was doing just that (before Trump got elected again in 2024)
I'm not trying to diminish the importance and role of personal accountability and individual action, but as a solution to affect meaningful change it falls well short.