It almost doesn't matter, for example the safemoon team's scams are documented on the Blockchain but the investors don't care. We can't underestimate the financial cultism of crypto people
Most fraud doesn't revolve around fudging the accounting.
SBF made billions of other people's money disappear into the crypto void without breaking the blockchain.
The idea that blockchain will prevent fraud is naive, absurd and laughable.
It doesn't make judgments about those using it. It works just as well for fraudsters and cyber criminals as anyone else. There are reasons ransomware extortionists always request payment in some sort of blockchain based crypto --- usually bitcoin.
In other words, blockchain *facilitates* fraud and crime as easily as it *prevents* it.