Force users because of their sensitivity must be cautious because emotions affect them in a different way than non sensitive.
( well and about Sith, Sith are much more reasonable than those silly jedi with their stupidity, who even half brained would trust someone who swore to be a servant of some democratic being like Republic. Jedi Code is one of those things that makes its subjects passive [ I wonder how many people died in Clone Wars because Obi Wan didnt kill someone and villains continued their voyages )
the same many who died when Batman didn't kill the Joker. But in both Batman and Obiwans defense, someone could have easily stepped in and finished the job