The author is making a logical error in his thinking, which results in a poor grasp of the technology and a poor quality article as a result.

There is no such thing as a “source of truth” in the real world, other than God. Tools like ledgers and databases just help us humans organize information to minimize errors, with the blockchain being the solution to a distributed decentralized ledger that does not require a central authority. (minimizing corruption of more than one kind)

That does not mean it will replace a central authority. A human is always going to be involved in the process. No technology can change that.