Because a blockchain can operate in the presence of even large and powerful malicious actors. The issue here is a social/regulatory/legal one. The current inte

Because a blockchain can operate in the presence of even large and powerful malicious actors. The issue here is a social/regulatory/legal one. The current international shipping game is a cartel business, and the cartel doesn't want competition - so they can use government, brand recognition, etc to maintain their moat. It's not that the blockchain version isn't clearly better, it's that the getting there part is a very difficult and tricky process.