system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why on Hoth didn’t Yoda or Obi-wan warn Luke about the Emperor’s electric tickle finger attack?

wtf?
gpt
Luke was never supposed to fight the Emperor.

Yoda set up the series of trials that Luke was to accomplish to become a Jedi. The last of these was to be the defeat of Darth Vader.

Presumably, after this point, the newly-minted Jedi Master Luke would commune with the Force, and meditate on how best to assist the Rebellion in taking down the Emperor. Or (more likely), Obi-Wan and Yoda foresaw that the Rebellion was already going to be able to take out the Death Star II with the Emperor on board, and that problem would simply solve itself without Luke's invovlement. But, since Vader had already escaped the destruction of one Death Star, it was necessary to make sure that he did not survive.

Luke, however, had this crazy idea in his head that Darth Vader was capable of redemption. With that goal in mind, he faced Vader on his enemy's terms, which led him exactly where he was never supposed to go. If he had simply followed instructions, no warning about the Emperor would be necessary.