Are you saying you're 100% comfortable sharing the details of all financial transactions you're a part of with "the world"?

Sure, your bank would probably want to inquire about the source of the cash if you were to bring a briefcase of cash to the branch for a deposit. But that would be private information sharing "channel" between you and your bank - both the source of your funds and the fact that you have them in your account is reasonably private compared to a wide open ledger sitting out there with all of the txs from day one.