Difference between the LA Rebellion filmmakers and the third cinema

An important difference between the LA Rebellion filmmakers and the third cinema they were inspired by is their creation of narrative films as opposed to documentary films which were upheld as the ideal film form by many third cinema thinkers. How does this important creative decision alter the revolutionary messages that the LA Rebellion filmmakers were trying to get across? What benefits might have these filmmakers seen in relying on narrative filmmaking as opposed to documentary? Was this decision to create narrative film the right one in terms of being revolutionary or was not creating documentary a missed opportunity. Discuss.