Perhaps the problem described is actually not the important one to solve. Once you leave the realm of pure digital operations and try to apply blockchain to any

Perhaps the problem described is actually not the important one to solve. Once you leave the realm of pure digital operations and try to apply blockchain to any real-world use case you run into the same problem again and again - the inputs to the blockchain could be wrong, either through an honest mistake or malice. Blockchain does nothing to resolve this, and it seems like a much more more common issue than malicious manipulation of data on the backend. Indeed, centralized authorities are actually a kind of solution to the dirty input problem, because they can alter records to agree with reality after the fact if a mismatch is discovered.