Today the crypto scammers, tomorrow the hedge fund traders.
The centalized approach you advocate rejects this principle, and instead preemptively restricts an entire class of ostensibly voluntary interaction, with exceptions granted when someone proves to some centralized regulatory gatekeeper that they are innocent.
The result of course is economic power being concentrated at the top. VCs now monopolize early round token sales. In 2015, ordinary were able to get in on the ground floor of the Ethereum token sale, and saw 1000X+ returns as a result. But hey, at least poor people in your centralized paradigm have lottery tickets:
https://www.theatlantic.com/business/archive/2012/03/amazing...
People should be free to make their own mistakes. But companies should be forced to disclose relevant and honest information.
I'm not necessarily convinced by the criticism of stablecoins specifically. But regulation of honesty and risk disclosure in the financial sector as a principle is something that has strong support.
Are you trying to convince people or just trying to catch someone tripping up on your bizarrely biased trick questions?
Consider reading a history book too.