Ask a broker about Black-Scholes; it will be refered to more likely than not as a "black box".
If the brokers don't get it certainly the client isn't likely to but, as the broker says to the client who's taken a liquidity bath, "well I made money and my brokerage house did too (on fees and commissions); sorry you didn't but two out of three ain't bad!" Fai de bèn a Bertrand, te lou rendra en cagant
But don't conflate broker with trader. Brokers have no skin in the game or even their company's skin. Trader's are carrying the risk and hedge fund people are usually required to keep much of their huge paychecks inside their own fund.
