Does anyone actually believe what Kylo said about Rey's parentage?
I did... it made perfect sense as a nice curveball to throw at the viewers.
Everyone spent two years wondering who her parents were, preparing themselves for the cliche that it would be Luke, hoping it would be something else more unexpected and epic.
Making them some drunk nobodies makes sense in terms of Rey's character, I think. She has no predisposition to aggression or light. She has no internal conflict based on heritage.
When she was meditating during her first lesson with Luke, she was at peace when she felt the balance inside of her. She tapped into the balance of everything, even the dark part of the island. Luke was frightened that she didn't resist it, but why would she? She doesn't know anything, either consciously or within her DNA as a Force user.
She is a blank slate, being used by the Force. Maybe she is the chosen one?
Now that I type all this, she's probably Kylo's sister.