Galan007
|Quantum Observer|
Mortis was a nexus point --a terminus of sorts-- for the entirety of the force...
Kenobi: "What is this place [Mortis]..?"
Qui-Gon(Ghost): "Unlike any other, it is a conduit through which the entire force of the universe flows."
-TCW: S03E15
And The Ones served as universal anchorites for the dark and light sides of the force respectively...
The Father: "My children and I can manipulate the force like no other. Therefore, it was necessary to withdraw from the temporal world and live here as anchorites."
-TCW: S03E15
That's why it was so important to keep BOTH sides balanced on Mortis. If the Son(dark) or Daughter(light) gained too much power/influence/control, it skewed the force-flow of the entire material universe. That's why the Sith became more powerful after the Son went full-evil and inadvertently killed the Daughter--the scales on Mortis tipped heavily in favor of the dark side, and the Sith were amped as a result. This was extremely dangerous because, as The Father said, "too much dark or light would be the undoing of life as you understand it."