Pablo said "The theme of family, legacy, lineage and all that is always important in SW. Sure, it's important in regards to Rey." Right here he confirmed Rey is a Skywalker. Because how would all that be important as he claims if her parents are some "random" characters?
There are other lineages in the galaxy beyond the Skywalker one. Rey’s being a Kenobi, a Palpatine or even the last in a line of dark Force users would make Pablo’s words here equally valid.