And what's to stop me creating thousands of these anonymous unregulated accounts to launder money? There are a lot of aspects to regulating the financial industry that have to account for the many different scenarios involved. The regulations for the finance industry aren't perfect but it is an incredibly difficult balance to strike.
What stops you from doing the same thing with cash and cash businesses? Nothing, why is why AML rules are pointless and should be abandoned because they're doing dramatically more harm than good.