Oh, and while making sure I got the script line right, I found this. For anyone who really believes that "fans made up" the significance of Rey's parents:
JJ Abrhams: "We're going to make sure that the answer is deeply and profoundly satisfying. Rey is a character that is important in this universe, not just in the context of TFA, but in the entire galaxy. She deserves it. We'll make sure that the answer is something that feels like it happened a long time ago, far away, and we're just telling you what happened."
But yeah...entirely fan created.