To me, the lesson I think Rey is learning is that her emotions are natural parts of who she is, and she shouldn’t try to purge her fear or anger, but acknowledge them. This would be like assimilating with one’s Shadow, in Jungian psychology.
If anything, I would cut, “If you don’t face Palpatine, it will mean the end of the Jedi, and the war will be lost.” To me this line is too reminiscent to this interaction with Luke and Obi-Wan.
Great post RL. Would be great (depending on feasibility) if he could say “If you don’t face your fear, it will mean the end of the Jedi, and the war will be lost.”