Here’s a random thing that I’m thinking about. I know EddieDean, in one of the previous threads, said that it shouldn’t be too clear what everyone’s respective destiny is orchestrated by Palpatine / by the will of the Force. But I genuinely think that is one of the greatest strengths here.
The reason Luke immediately gives up on Kylo, but was willing to give Vader a chance, is because he literally saw that Ben was destined to rule the galaxy as a tyrannical ruler and never be redeemed. This is why he cannot believe Rey’s own vision of her redeeming Kylo in TLJ. Which we of course know Luke was correct about in that film, at least. Furthermore, we know Rey is destined for the same dark fate due to her vision in this film.
We don’t want to deny either of these as fact, as that would mean by the end of TROS that Luke wasn’t wise enough to acknowledge the limits of foresight, acting upon a foolish notion that they are inevitable, and it would also mean visions of the future are false if you just try hard enough. None of this is particularly satisfying, since as we learned from Anakin’s story and Luke drawing his lightsaber, everything points to the idea that the more you try to resist fate the quicker it comes about. This would give Luke a reason for going to Ahch-To, because he believed that being involved in the fight would only draw that dark fate closer.
That’s why I think it’s critical to emphasize that the dyad is so powerful that it allows them to change fate itself. This means Luke was arguably justified in all his actions, and it doesn’t diminish the value of foresight in the Star Wars universe going forward. We can just make an exclusion in this case, and the fact that their bond was something created by the Force itself makes it seem like this was the wrench it intentionally threw into Palpy’s machinations so the good guys can win.
Everything also lines up with this idea. So, for example, despite Leia’s best efforts, Kylo can’t be redeemed and is going to die leaving Rey alone to inherit the throne… until Rey is somehow able to heal his fatal wound. Rey is about to slice down Palpatine in the ritual… until Ben reaches out to her through the dyad. Heck, even going back to TLJ, Snoke says that he cannot be beaten and that he sees everything that will transpire… until he gets fooled by the distraction set forth by Kylo using Rey as bait.