2 minutes in he says here that Vader defeating Palpatine and removing evil from the universe brings balance to the force.
You're interpreting him in a way that is indefensible from a logical standpoint ( while relying on certain convenient unspoken assumptions along the way ).
Namely: how did we end up talking about evil here? If we are to think that the words placed by others in Lucas' mouth about the light side, the dark side and the balance are correct, shouldn't we have expected Lucas saying something about, well, the light side and the dark side?
Why should the death of Palpatine "remove evil from the universe"? What kind of universe are we left with after he is killed?
A universe with no evil beings anywhere? Or even any beings among all the uncounted multitudes out there who are even a tiny bit evil?
A universe that lacks even the capacity for evil?
How do you get all that just from Palpatine being thrown down a hole?
Are we to imagine, in bending over backwards in ridiculous fashion to somehow make internet revisionism work, that ROTJ somehow magically turned all evil people good and removed the capacity for evil to even exist? Is that what you thought was happening when you watched ROTJ?
Then why didn't any of the EU authors in the 1990s write as if their setting was an evil-free universe? How did the First Order, Snoke and the Knights of Ren come to be? And why did Lucas equate Luke's role going forward to the equivalent of a police officer?