There is no version of the story in which Rey’s parents being the progeny of Palpatine are ‘nobody’. At the very least they have a claim to the remnants of the Empire, regardless of what Force power they do or do not have. Rey being the grandchild of Palpatine absolutely gives her a place in the story; it is literally a noble birth.
Rey throughout the trilogy is desperately searching for someone to validate her abilities and place in the story, and TLJ does the thematically necessary step of ripping that away from her. TROS gives it back on a silver platter.