Yeah, that's what I mean JJ could add things that change the context of scenes in TLJ.He also says it's not up to him, because he's not doing the next movie, and even freakin' quotes "from a certain point of view" which references probably the craziest retcon in cinematic history. So he heavily hints that at the very least, Kylo's words could be reinterpreted in the overarching plot.
One of the things that really stood out while reading and listening to interviews with RJ post TLJ is how careful he was with his words and also how considerate he was with other people's opinions of the film, wording his answers in ways as to not trump their interpretation. Lots of "for me" and "I think" rather than "this is the way it is is and that's a fact".