A good way to explain it is with a blockchain the math guarantees that you'll be able to detect modifications to the data, or if some data is missing, the poten

A good way to explain it is with a blockchain the math guarantees that you'll be able to detect modifications to the data, or if some data is missing, the potential of modifications. But even with a blockchain, the solution is the same: build an "escape hatch" into the validation software that allows certain kinds of data modifications and/or deletions to be ignored. The only difference is with a blockchain you'll have stronger guarantees that auditors will be able to detect if that has in fact happened. It is true that certain types of blockchain cryptographic structures can greatly limit the granularity of those options. But no-one actually uses those types of blockchains (namely chains without per-block merkle trees), so that point is moot.