The direction of pull is also relevant... he might miss the thighs and hit only the calves, or he might miss one leg but hit the other. The probability of a clean getaway is rather low. During combat, Jedi/Sith tend not to be able to push/pull each other easily due to naturally negating telekinetic actions with their own telekinesis. That is, for example, how Jedi/Sith are able to hold onto their lightsabers during combat rather than merely yanking them out of each others hands.

And with Sish's current state, he won't be satisfied before someone is wounded. Preferably in a serious fashion, but the degree of it is... negotiable.