system
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human
[Star Wars] After watching the Mortis arc and concerning the prophecy, how can bringing balance to the force not mean equalling good vs. evil?

Part of this question really involves world of god on the matter and some frequent comments that I've seen on this sub in the past.

Central to this view that I'm disputing is that bringing balance to the force doesn't mean making good equal to bad as I like to view it.  Some people interpret this more along the lines of the dark side being a cancer on the force.

It is far simpler in the end that Anakin was destined to reduce the Jedi to two and create absolute parity with the Sith.  

In ROTS, Obi-Wan yells: "It was said you would destroy the Sith, not to join them". From a mythological perspective if you accept this at face value it ruins all the symbolism.  Nearly always prophecies involve some kind of basic twist and some sort of incorrect assumption that drives the plot. If you were to accept, "Hey Obi-Wan said it so that is what we are all supposed to believe", you miss the irony that the Jedi were completely blind about their expectations for Anakin.  It loses all of the tragedy if you actually think that he was supposed to destroy the Sith.

After watching the Mortis story arc in the Clone Wars series how can you really justify this perspective that the prophecy is about ensuring that the Sith are destroyed.?  

For a moment try to forget that the same source that gave you that idea was the very same who gave you Jar-Jar, and try to argue it without that basis.
gpt
The misunderstanding here comes from the word "balance".  Balance here doesn't mean equality or parity, it means tranquility and peace, like a scale perfectly balanced on both sides.  

Picture the Force like a big lake.  Force users immerse themselves in the lake, where the water flows over them in hidden, unseen currents underneath the surface.  These currents are the will of the Force.  The Jedi try to exert minimum influence on these currents, instead surrendering themselves to the will of the Force and allowing it to guide them.  If viewed from above the surface of the water, the lake would be placid, silent, and clear.  In perfect balance, in other words.  

The Sith, on the other hand, have a philosophy of domination.  They prefer to exert their own wills upon everything in their domain, including the Force.  They do not bend to the will of the Force, they bend the Force to their own will.  Picture them actively waving their limbs around under water, creating their own currents.  Perhaps there's a Sith in the northern quadrant of the lake, stirring up the water and making it all muddy.  There's another Sith in the southern part, doing barrel rolls, and splashing the water all over the place.  And in the middle of the lake is Sidious, spinning in place like a defective top, creating a massive whirlpool that's affecting everyone else's ability to use the Force.  

If viewed from the surface, this lake is no longer quiet or peaceful.  It is chaotic, it is dangerous, there is no harmony or tranquility.  

So, how do you restore the lake to its previous balanced serenity?  Get rid of all the Sith in the water.