As I was preparing for TLJ: Legendary, I supposed that the reason for the caretakers’ existence was for that scene, and that I should either incorporate that scene or remove the caretakers altogether. I went with the latter because I agree with RJ’s commentary, to the effect that without this scene the last time Rey and Luke converse prior to their falling out has a suggestion that Luke might give in to her beckoning. When Luke is approaching her as she ‘touches hands’ with Kylo, it seems like he was just about to come over to her perspective.