You made an interesting, paradoxical observation. In the films, Anakin's role was to destroy the Sith order. I mean, the chosen one is not supposed to destroy the entire darkside, the darkside of the force is a part of nature and always exists, but he has to defeat the evil people who use it. And not all darksiders, just the Sith Order. The reason is, they are the main predominant darkside group that's causing all the trouble. So, in the film story, not fanfic ideas, anakin is the chosen one because he ends the Bane sith order. With both sith either dead or converted to the light at the end of Episode 6, no one is there to continue the cycle of the Rule or two, no sith exist anymore. If you really think about it, the prophecy of the Chosen One seems kinda violent, you know? As I'll get too soon, I'll explain a plot hole in the Chosen One idea in the movies. Here's the explanation for anakin's conception, as you asked. from the SW wiki. It had to be plageius involved somehow. I mean, why would Lucas put that in there for no reason? But that makes no sense either. Plageius was a sith legend. He was around thousands of years before ROTS. Legends are old stories. How could he have been around to create anakin? Nearly a decade before his death, the Sith Lord, Darth Plagueis, and his apprentice, Darth Sidious, committed an act that directly violated the nature of the Force. To advance their plan for galactic domination, the two Sith attempted to will a being of their own design into existence, pouring their abhorrent intent into waves through the Force to the countless midi-chlorians that were spread throughout the galaxy. The experiment failed, however, and the midi-chlorians, not willing to obey, not only frustrated Plagueis' attempts, but countered in reprisal, conceiving a child within the slave Shmi Skywalker. Skywalker's mother claimed that her son was conceived without a father, but could not explain how that had happened. It was the theory of Jedi Master Qui-Gon Jinn that the will of the Force caused his birth. Wasn't Palpatine immortal? Or was he gonna die anyway? So no need for a chosen one. How was Anakin the only one who could do it? Are you telling me, that if Qui gon never freed anakin from tattoine, the Sith would rule the galaxy and destroy dozens of planets, for all eternity? Millions of years? What? So, without anakin, it couldnt be done? Well, windu was just about to defeat the sith, before anakin stopped him. Plot holes. I'll admit, your ideas are pretty good though. George Lucas made a story filled with plot holes and a convoluted plot points that he didn't explain. The only problem is, he never explained the plot holes to fans.