>>100671802He's got more important shit to do than stabbing a bunch of dudes in the face all the time plus he can't be everywhere anyway. This was more a matter of them all being there so he felt, hey, why not? He started his comic having the Emperor rub his face with the fact that his failures proved he was nothing but a weapon best used by other, more capable men and he decides to prove it.
That and he can still make mistakes from time to time. The one that stands out the most was when the old Jedi librarian lady actually got the better of him as Vader. Seriously, do not fuck with nerds.