This is a strange statement. It's like saying that a forloop isn't authoritative because it hasn't been approved by a court.
"Legal authority" isn't a well-defined object in the evaluation of smart contracts. It is certainly not an authority in the sense that the EVM (or, for other blockchains, corresponding VM) code is.
Is this really a surprise? Nodes don't evaluate common law, they evaluate smart contracts.
That's one of the reasons for enthusiasm for blockchain tech. Not everyone believes in the legitimacy of the state, let alone that the legal system is somehow the proper authority for evaluation of disambigous source code.