Hey Jarbear! You’re totally right. I mean, it is fine the way it is. But, I like to think changing the dialogue to be more focused on Rey would show how Luke’s teaching method is a little bit different than Obi-Wan or Yoda. He isn’t just giving Rey an order, “You must face Palpatine.” He is really honing in on what is bothering Rey, which is her fear. That fear is not only manifesting physically with Palpatine, but also internally, with Rey questioning her own morality. She already knows that the war will be lost if she doesn’t face Palpatine. She doesn’t need to be told that. Because when you boil it down, Rey stranding herself on Ahch-To is less about being afraid of Palpatine, and more about Rey being afraid of herself and what she might become. She says as much in the scene.

Luke: What are you most afraid of?

Rey: Myself.

These dialogue changes I suggested really hone in on what Rey’s issue is, imo. And I think it makes Luke and Rey’s interaction a lot more personal. It also makes this final lesson not only clearer, but also long-lasting. He’s not just telling what she needs to do right now. He is telling her that as a Jedi, she must always face her fears, rather than hide from them, whether it be Palpatine, a future enemy, or herself.

It reminds me of this Nelson Mandela quote, “Courage is not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear.”

Yoda in the prequels said that fear was the path to the dark side, implying that Jedi should feel no fear.
I think it would be nice to hammer home this idea that Luke is saying that it is okay to be afraid, but a Jedi must confront that fear, rather than ignore it.

Yes, Luke basically says that in the theatrical version, but I think by not focusing on Rey’s superficial quest, it does a better job at showing Luke as a master passing on wisdom to his student.