You must have read a different interview than the one I posted. Jackson never said that he wasn't aware of the entire story while making these films. That would have been pretty hard since they shot all three at once.
Would you mind posting the quote where he says he wasn't aware of the entire story? Thanks.
He makes it seem like they spent all this time developing the lure of the ring and then were faced with Faramir and just couldn't deal with him. Well, Tolkien dealt with it for them and in doing so, produced one of the most important characters in the story. Hey, guess what Mr. Jackson? There really are quite decent people out there who are not lured by power.