Money management is the defense that keeps you in the game when you don't know what you're doing. But ultimately it is knowledge that is the offence that will make you the money.
Money management is not even a secret or hard to learn, the pros might be underperforming because of their reliance on it actually.
Money management (MM) is the easy part - which is why funds obsess over it. Because of MM, funds can stay in the business long enough to collect enough fees to launch more funds and shut down existing under-performing funds. Knowledge is the unquantifiable hard part of trading when dealing with an infinite amount of constantly changing variables- the mystery part.
Given that you are the author of this thread, you have just answered your own question. Jolly well done!