Many libraries have staff structures where discovery and fulfillment configuration are handled by different staff (who may be in different departments.) Having the "Discovery Interface Display Logic" menu in Configuration > Fulfillment means that discovery administrators must be granted fulfillment administrator roles to configure those aspects. In a "least risk" permission model, it would be much more preferable for those options to be on the Discovery Administrator menu - instead of fulfillment, or at the very least in addition to fulfillment, so that the extra role does not have to be granted.