[pphysch]

The two parties either agree, or they don't. Full stop. Blockchain, or any buzzword technology, doesn't solve this eternal problem.

Third parties have historically been pretty good at sussing out consensus from the two. Judicial systems, market exchanges, etc.

When you pay a middleman, you are literally paying for Trust-as-a-Service, among other things (brokerage, etc).

Blockchain also costs money to build and maintain as a service, but it's probably the fact that the enormous cost is socialized that makes it an easy pill for many to swallow.

[proofofmoon]

Who maintains the source of truth for this record of agreement? If it is one entity, that's the unaccountable middleman. Blockchain is not right for every environment, but there are industries where the middlemen are taking more than the equivalent of every party maintaining a blockchain team.

And court cases are even more expensive.