No, because that is based on the assumption that Lucas would be so devoid of competence that he'd need all the members of his crew to constantly challenge his ideas. And in 1997, the general populace had little reason to believe that. Sure it's possible that any good director is only good because his subordinates are substituting all of his talentless schlock with actual good ideas, but do you really think that the Key Grip saved Christopher Nolan from making Inception a musical comedy about the holocaust?

Oh, and that reminds me. Aren't you ignoring me? ^_~