I think it goes deeper than that. Look at Lucas' filmography as director. THX, American Graffiti, ANH . . all with Marcia editing credits. And after that . . well, you'll be hard pressed to find any directing credits at all, until the Prequels, more than two decades later. So devil's due to old George: it's been 22 years since I looked at SAP BAPI, and if you sat me down in front of an IDE to program the stuff I would probably be even worse at it than Lucas was at directing movies in 1999. Granted, I know this, and I would not take a BAPI gig without thoroughly warning my would-be employer that I am going to suck at it.

There must have been a sort of magic there, something greater than the sum of its parts, but that's true for an awful lot of great films. There's always some great unexplainable They seem to happen by accident, by lucky intervention from a gifted cast, by a once-in-a-century musical agglomeration, by a herculean labor of love from everyone concerned, through the titanic efforts of singular madmen (who often become as much of a story as the one they are trying to film). The directors we remember are the ones most likely to appear with these miracles on a semi-regular basis. Maybe George and Marcia were one of those thermodynamic miracles, great unexplainables.