system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did Palpatine intentionally attract the rebels when the death star wasn't finished?

I understand he had a shield generator on the planet and didn't think he'd lose. But why not wait until the death star is 100% done? It looked about 75%, so it clearly wasn't taking the full 20 years like the first one. 

Even if he was fairly certain of his victory on the planet surface, he could've waited a few more months and then basically nothing would stop him.
gpt
The thing is, he wasn't "fairly certain" of his victory. He was absolutely and totally convinced that the rebels would be crushed. Palpatine was incredibly powerful and his power made him arrogant. He *wanted* the rebels to attack before the Death Star was finished. He believed that if the rebels thought they had a chance, they would go all out. Which, of course, they did. Palpatine set everything up "perfectly," but he miscalculated every element of the actual engagement.

Remember, Palpatine was very clever, but he didn't single-handedly engineer the fall of the Jedi and the Republic. As a fascist lunatic he saw all the successes as his own, and all the failures as someone else's. By the time the Battle of Endor came along, Palpatine thought he was unbeatable. Then his apprentice pitched him into the reactor.