You should look at some of the recent failed insider trading prosecutions. If you sell the info and expect someone to trade on it, and thus you are benefiting from ill-gotten gains, then they MIGHT be able to prove conspiracy. My point is that if you have MNPI and I pay you for it, and that's the end of it, well that's not illegal. It may be a civil violation due to NDA or something, but that's different.
I can imagine that what you're saying is true if there was no danger to the public.
But if someone were to trade on the knowledge that a supplier had delivered faulty airbags to an auto manufacturer without telling that manufacturer, I doubt this would be looked at kindly by the courts.
But I agree that the metaphor is not ideal. Selling 0day exploits to that broker is much worse. Any seller would have to have a reasonable expectation of aiding organised crime or terrorism.
