Jerks play dirty and will always try to find a way to play dirty to gain advantage. It's really hard to reform a jerk. Then, imagine that person does well, get

Jerks play dirty and will always try to find a way to play dirty to gain advantage. It's really hard to reform a jerk. Then, imagine that person does well, gets promoted, and once in a position of power goes full jerk again. Then your company implodes.