TFA didn’t make a big deal about Rey’s parents, Rey did and people on the internet did.
WYSHS
True. Point being though that only Rey cares and this doesn’t change in TLJ. Anytime she brings up Jakku in TFA people think she’s crazy for still caring. Maz outright tells her to forget about her parents.
Making Rey’s parents an issue was a creative choice in the film. Rey’s pining for her parents was the chip on which the story salsa was conveyed, but she is not independent from the film. TLJ made a point not only that her parents didn’t care about her (which was sort of obvious) but that they were nobody. And why would we have thought they were somebody? Because the film set up that intrigue - deliberately exploiting expectations of people on the internet, to be sure. A film attempting to stand apart from the OT shouldn’t do that.
This point for me is more what Luke would call a “a cheap trick” but it’s there. Can’t pretend it’s solely the fault of fans or that dastardly rogue Rey.
edit: I didn’t want Rey to be another relative; I wanted her to be her own person. That is why this doesn’t really bother me. But if you feared, based on TFA, that Rey would be ‘someone important’, I think you can recognize how the TFA set that concern up. And for those who like that she is ‘nobody,’ what if we discover the opposite in EIX?