Im guessing you never worked at a major IB....
Most of the quants as brilliant as they may be,are a bit "disconnected" from actual trading/reality ,while the head the trader is the King of the Jungle,in this case Meriwether...They make the calls,not the quants..
Meriwether was a god like figure at Solly and could do no wrong...or so he thought...
So it is an issue of overtrading, one of the biggest trading pitfalls facing us retail traders.