Assuming this is a genuine comment and not a troll, how would a blockchain solve authenticity? Never mind the fact that we already do have a way to verify authenticity in the form of digital signatures. The problem is: how do you know the signature signer is who they claim they are? The best solution we have to that is the “web of trust” and “key signing parties”[0]

[0]: https://en.wikipedia.org/wiki/Key_signing_party