not accirding to Rian Johnson
"The director also spoke to how he came to the decision to make Rey’s parents seemingly unimportant in the established universe of the movies:
“I was thinking, what’s the most powerful answer to that question? Powerful meaning: what’s the hardest thing that Rey could hear? That’s what you’re after with challenging your characters,”
“The easiest thing for Rey and the audience to hear is, Oh yeah, you’re so-and-so’s daughter. That would be wish fulfillment and instantly hand her a place in this story on a silver platter…The hardest thing for her is to hear she’s not going to get that easy answer. Not only that, but Kylo is going to use the fact that you don’t get that answer to try and weaken you so you have to lean on him,”
"