The third party has to demonstrate trustworthiness, but isn't that always how arbitration of a disagreement works? Even in the existing monetary system with all

The third party has to demonstrate trustworthiness, but isn't that always how arbitration of a disagreement works? Even in the existing monetary system with all its clawbacks, someone has to decide whether you're actually eligible to get your money back. At least in this system, you could have whole services that build a track record based on publicly identifiable information. You can't flood them with reviews to skew the results because you can cryptographically verify whether the reviewer was party to the disputed transaction. There are a thousand theoretical variants on the same basic idea, but it's at least no worse than the existing system.