But they were nobody. Even TROS confirms that
It certainly wants you to believe that. But if you found out that one of your parents (parents who died when you were little and apparently led unremarkable lives), say, your dad, was actually Hitler’s kid (or, for a more canon-accurate example, a clone of Adolf Hitler!) and gave his life to protect you from Hitler, would you really insist that your parents were nobodies? Rey certainly doesn’t
Just look at Rey’s arc in TFA and TLJ. It is all about her parents leaving her. By the end of TLJ she has overcome that issue. In TROS we learn that she didn’t have all the information and that one of her parents (in the film it never specifies which parent and does not mention clones) was a child of Palpatine and her force powers echo his. It is a new journey for her. It might partially reopen the old one, due to what she learns about her parents, but she had come to terms with the worst scenario so learning her parents didn’t just abandon her but were murdered as they tried to protect her would be a positive change. It is confirmation that they didn’t just leave her, she was loved and wanted. But she already found that in her new group in the Resistance. Her character arc in TROS doesn’t revisit that but moves forward with the bad side of the news, that she is a Palpatine and it completely derails her sense of placement. Now she questions if she really can be the Jedi savior (and we see at the beginning that she knows she hasn’t reached the right level of training and mindset yet).
But let’s look at Rey’s parents and what they mean to Rey and her journey. There was a build up in TFA that Rey was somebody. That she came from somewhere. It was mostly fan flamed. She had to be someone. So the reveal that her parents were nobody special came as a shock. To fans. It fit perfectly in the story. Rey wanted to be somebody, to belong with this new group of people she found. But there was no link. She remembers that her parents were nobody special when Kylo forces her to admit it. But let’s compare her lineage to the Skywalkers. Anakin was the chosen one, possibly the most powerful force user the galaxy has seen. But he did not get the right teaching and fell to the dark side, but he had twin children, each powerful in the force. And whether or not Lucas intended it or not, Leia shows she is powerful in ANH when even Vader can’t get anything out of her. Luke, of course, becomes a powerful Jedi and starts a Jedi Academy. He has no children (in the film canon). Leia has one son who is powerful in the force. But Rey is a Palpatine. Sheev is her grandfather (biological or clone doesn’t matter). Sheev is powerful in the force. His child is not. There is no indication of any force powers in either of her parents. This actually works nicely into the story if Sheev’s child is a clone, but that has no bearing on the movies. So in terms of being Jedi, smugglers, or any sort of heroes, her parents were nobody. They were just travelers. And yet from those two nobodies comes a new chosen one, very powerful in the force and able to learn very quickly from Kylo, Maz, Luke, and Leia. How does such a person come from nobody?
I remember the discussions on this site where we argued what family she was. I thought her accent was a key. We had all sorts of theories. A few thought she shouldn’t be related to anyone. Kenobi and Skywalker were the other choices. No one said Palpatine. Then she was nobody in TLJ and then a Palpatine in TROS. But this again parallels the revelations in the OT. Anakin and Vader were different in ANH, then Vader is Anakin and Luke’s father in TESB, then Leia joins the family in ROTJ. Luke has to deal with each of those. Rey has to deal with each revelation about her parents, They aren’t coming back, they are nobodies, Palpatine is her grandfather.
See, I personally find the return of Palpatine and Rey being a Palpatine a genius idea that really caps the series. There is so much symetry and poetry in it. It ties everything back to the PT. And even better, it is so true to the Flash Gordon origins of Star Wars and the Ming origins of Palpatine.
And in the Mandelorian we get a final piece to the puzzle. Making a force sensitive clone is hard. The events that end season 2 have a place in the narrative. That blood sample from Grogu unlocked making a force sensitive clone and the rise of Snoke an the resurrection of Palpatine. At least that is what seems to fit now. We will see where they take it.