system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did Yoda and Obi-Wan emphasize that Luke needed to go after Vader when it was Palpatine that was the true enemy?

It's pretty much agreed that Vader didn't have the political finesse to hold the Empire together so the Vader issue would resolve itself.
gpt
Because they were related and had a powerful emotional bond. 

Remember Luke's failure in the cave? 

Defeating Vader was as much about defeating his own issues as it was fighting Vader. And Luke had serious daddy issues. 

It was about making Luke into a Jedi, not about saving the galaxy. If Luke became a true Jedi then yoda believed the rest would kind of work itself out through the will of the force.