But why would the traditional process of the Sith apprentice succeeding the master mean anything to them? They don't even know that Palpatine or Vader were Sith.
"Grant Allen [...] had written a book about the Evolution of the Idea of God. [...] it would be much more interesting if God wrote a book about the evolution of the idea of Grant Allen." ~ G. K. Chesterton, The Everlasting Man