Footylover has hit this issue on the head.
EDT is about individuals trying to win the cars as the first option, as the natural consequences of excellent performance being highly ranked within EDT and then (hopefully) the league titles follow.
The key here is that it is competition against each other as the main priority, with the end result the consequence of those efforts, whereas the FFC mantra seems to almost be the exact opposite, as anytime there are rules in place on your DT that you have to abide by, then its really not your team anymore.
EDT tries to avoid group think at all costs. FFC encourages it. And really FFC is like the Simpsons all over again, with similarities between teams unusually high as there is common ownership.
And where exactly did this theory come from??? There's no source or evidence out there that actually states this is true.
Thus, it seems this whole theory has come from DWD's mouth. Heaps reliable source don't you think?