It's a good question, Daniel.
Again, I would come back to the point that public blockchains like Bitcoin, by their nature, are public. You can see every transaction that's ever occurred on the Bitcoin blockchain since it was created. That's a degree of transparency that we don't actually have in aspects of our banking system otherwise, where we rely on intermediaries to produce their own ledgers of transactions that occur.
I do want to respectfully call into question this notion that Bitcoin is somehow able to amplify secret transactions that wouldn't otherwise be detected by our legal and regulatory system. I think there is great promise in using the permanent public ledger of Bitcoin transactions to actually amplify and improve law enforcement and stamp out illegitimate activities.