Recounting her experience of attending the first screening for The Force Awakens, she apparently thought the mystery received a fairly clear answer, and the number of people who begged her for more answers subsequently surprised her.
That at least provides some explanation as to why everyone in The Force Awakens generally knows who Rey is, except for Rey herself.
It appears that the answer to the question of her parentage may actually be hidden in The Force Awakens, and we just never noticed it.
Daisy Ridley recently spoke to Time Out about the mysterious nature of Rey’s parents, and it seems that she actually doesn’t find it very mysterious at all.