joker, the reason why I reference TLJ is because RoS has to be built based on the foundation TLJ has set, or the lack thereof.
let’s take the Ironman movies. Tony becomes adamant about building an earth defensive shield (aka Ultron) because he is fearful of an alien invasion that could wreck earth. Why does he think this? Because he experienced an alien invasion in Avengers 1 and knows the threat is real (he essentially died). He is also haunted by the fact that he essentially died and suffers sleepless nights and trauma, directly impacting his performance in Ironman 3 with a ton of armors but his latest venture being pretty shoddy because he has been operating on 2 hours of sleep for several weeks or so.
TLJ’s foundation should come from OT, that Luke held adamant faith in his father and was rewarded for it. That is the foundation and so to have a reaction that goes completely against that foundation is going to feel off unless it is adequately explained. It’s also why many directors argued RoS was screwed from the get go and JJ was fighting an impossible battle. The foundations set in TFA were destroyed in TLJ and did not lay any new ones down which is why TLJ is a terrible mid-movie in the trilogy, because it fails its purpose to build upon the story to its eventual climax. You can love it (I love the Room) but the writing sucked.
and this interpretation of Luke sounds more like Batman than Luke Skywalker (if there is even a 1% chance he is our enemy we have to take it as an absolute certainty).
this is honestly quintessential Luke, the culmination of his character development as of OT.
Face to face with Vader, an embodiment of evil, he tells him that he will not fight him and that he can sense the conflict of good and evil within him and believes the good can win out. It’s Anakin who sees and believes in the visions of the future and how the dark side is too powerful.
The final saber battle between Luke and Vader, although from a technical standpoint is pretty mediocre, is so powerful because it represents the struggle and final victory of Luke’s ideology. He is driven to anger and attacks Vader after he threatens Leia and sees how powerful the dark side is. Yet, he constantly refuses to turn or give up faith in his father and is rewarded with Anakin not only killing the Emperor (allegedly) but also reaffirming that Luke’s faith in him was right with his dying breath.
The Luke in that art book better describes Obi Wan. Luke never “experienced“ the dark side since he never fell to it. If giving in to anger is all it takes, Obi Wan, Yoda, Windu, and pretty much every other Jedi is also experienced in the dark side. Luke did see first hand that despite being twisted beyond recognition by the dark side, a person can still be redeemed.
Now if Luke did see Kylo was the embodiment of the dark side and was darkness incarnate and that he had to kill him because Ben would cause unspeakable evil, they needed to make Kylo much stronger. As the embodiment of darkness, he should be more powerful than Vader or Palpatine. Redemption is impossible because darkness is where his true self lies. The fact that the embodiment of the dark side loses to an untrained farmer girl 3 times with marry a scratch on her makes the dark side seem incredibly weak.