Yeah, I'd agree with this. Of course, both the 'brilliant jerk' and 'incompetent but nice' folks are a liability in the long run (they both drive away genuinely

Yeah, I'd agree with this. Of course, both the 'brilliant jerk' and 'incompetent but nice' folks are a liability in the long run (they both drive away genuinely nice, talented contributors), but the jerk tends to drive them away more quickly, and they also tend to discourage less competent people from getting better at their job too. And that eventually leads a team or group to stagnate. The only people who will stick around are either jerks themselves, or generally lack a back bone.