I think people are confusing the publication date and setting of the story/account within it.
Star Wars took place a "long time ago" but we don't try to prove it either way -- it's just the setting of the story, whether or not it really happened.
Are you saying it would further the discussion on a thread about actual ancient artifacts if I came in and described how interesting it was that it correlated with some stories from, say, Battlestar Galactica?
Star Wars, like the holy books, are works of fiction and the story contained within bears no resemblance to reality nor do the dates claimed bear any resemblance to the truth.