Everything trends towards centralization. Tech especially. All the top chains are heavily centralized in (Hash rates, holdings, influence, Insert blockchain metric here). Blockchains has trended towards centralized entities and personalities and i expect the trend to continue.
>these nodes are run by an anonymous collective
up until around 2017, that's how blockchain worked and gained traction.
And now most high level entities in blockchain tech now have identities/companies and individuals associated with them. Twitter has allowed these identities to stay 'psuedo-anonymous' sometimes but their 'identities' and leadership influence over the chain/ pools and infrastructure has remained.
>That’s a regression in the trust-value chain for most real world applications
Blockchain trustlessness is the whole value.
There would be a central regulatory bank that administers financial transactions and serves as a source of truth while Point of Transaction registers send the data for the plusses and minuses in every non-physical cash transaction event.
It wouldn't supplant the physical dollar in any reasonable time as there are many reasons why such bearer bonds would be useful, but I could see it displacing the VISA/MC/AMEX/DISCOVER dominance over electronic financial transactions in America at least.