Considering that Baxil, in his interlude, prays to a being he thinks of as "the Prime Kadasix" (i.e. the Prime Herald), it isn't a stretch of the imagination to surmise that the Emuli (and the nations they share culture with) regard Yaezir as the leader of the Kadasix, or at least a first song equals. Which suggests, in turn, that he does lead - and his worshippers pray that he leads them in wisdom.