It’s pretty dishonest to say that post-SE and post-PT there hasn’t been a narrative that George Lucas is a fraud and more of an “ideas man” that basically can’t do anything, and it’s often backed by people saying the Original Trilogy and the original movie would’ve failed and were saved by its editors, chiefly amongst them Marcia Lucas, or by Gary Kurtz, who “heroically left after George decided to turn Star Wars into teddy bears and stuff”. And George’s own contributions go to shambles.
If one is to look at it objectively, Marcia’s statements both disprove the narrative that she and the other editors “saved the film” and the narrative that Lucas is a mastermind who’s never made a mistake and needs no help.