when they do that and you rightfully picked examples of djino and chikito,they somehow appear as a victim and gain a lot of sympathy
from that for example djino by claiming being a victim got on his side many fans who do not like jb,plus some who appreciated him in bcbg and will continue to plus some fans of music just seeing him as a good artist,whereas when a musician leaves himself most of the time he is labelled ungrateful or even insulted
in both cases there is always a part of the fans who will be angry but lets say its safer to leave when "the boss did not want you anymore"