What do I gain by  the "highest level of self realization"? Answer: If you aim at shared solutions you get long term effects including security. 
Can SCm restore "social capitalî? If one admits that the will and skill to find shared solutions emanating from shared concern is a social capital SCm is a good tool. Going beyond the empirical evidence acquired with conflict resolution with teenagers depends on the interest of people.
What "makes it tick" when SCm succeeds healing bullying even behind the backs of the teachers? The bully suspect's concern that the violent atmosphere of the bully group could be directed towards him or her. (Provided that the teacher-therapist has the know-how  to elicit that concern and has an elaborated insight guiding it? often before he or she has read Anatol Pikas'texts.)