Earlier quoted context omitted.
This is how a fintech Chief Compliance Officer explained it to me: The industry that the SEC regulates is full of clever people who have a financial incentive to push rules as far as possible. The concern is that if they provided a clear line between what is allowed and disallowed, that everyone will go right up to the line and then find creative ways to exploit how it’s defined. The SEC prefers to keep the line fuzz…
This sounds like a ploy to justify selective enforcement against whoever the regulators don't like at any given moment.
It's basically "unsportsmanlike conduct" for the financial system. The NFL doesn't tell you exactly how hard you have to push the other guy before it counts as unsportsmanlike conduct, because that would be stupid, extremely context sensitive, and only help players push each other around more. It's up to you as a player to actively stay on the right side of the fuzzy line for that exact reason.
Every person on here who works in tech should understand how stupid "no the rules need to be clear" is when it comes to bad actors and adversarial systems. Imagine if it was expected for you to clearly explain to a user who failed your internal risk system what caused them to fail, so that they can fix it and try again. Imagine if you were asked to implement a system that explained clearly to your users what would get blocked as "carding behavior". It's clear to those who have built or worked with these kind of systems how utterly stupid and self defeating such an endeavor would be.
There isn't even an unambiguously correct definition of "Fraud" in the first place!