You missed the point of what's being said. Star Wars is all about letting go of your ego and trusting in the Force, in your friends, and in other people. What it isn't all about is the hero usurping the bad guy's position and becoming the ultimate power in the universe. The latter is nothing but a fascist power fantasy. It's Luke Skywalker putting on Darth Vader's mask. It's Luke Skywalker becoming the Death Star. It's perfectly emblematic of Kasdan's cynical mindset contrasted against Lucas's humanistic, life-affirming one.