It’s bizarre that this is legal. It’s all based on “trust us” without qualified audits or verifications.
It also seems like without catastrophic retail investment losses, politically there isn‘t much to gain with implementing such a regulation, and potentially much to lose. Reacting too late to prevent harm seems to be the logical outcome.
A lot of protections have been put into place since then. There's a reason we prosecute Ponzi schemes, offer FDIC and SIPC insurance, stress test banks, etc.