My current Zenith was essentially a member of the gestapo before his Exaltation. He finds it simultaneously amusing and horrifying that he was Chosen as a "priest." He has decided that Sol Chose him because he needed results, not piety.
Anyway, I think there is a great deal of story value in the Zenith vision. If you personally find it confining rather than inspirational, there are four other Castes without that mechanism.