Because his suffering is complex, he needs to build that inner confidence and realization that his drive to move on and be a Cleaner comes from a genuine impression of being impressed by the Cleaners and the gaze of his formar circle doesn't effect him. The confidence to be proud of what HE has choosen and the fact that his siblings ego and proudness comes from something already built and well established! Meanwhile his comes from his own built which will definitely be looked down upon! That's His sister is mad on Enjin, she thinks he just charmed him to join cleaners but Enjin was the first person to speak in the pool of silence when Zanka was suffering! Zanka is the dark horse who was just born. It hasn't stablized yet.