The nobility enjoyed an exalted status in the Vesia Kingdom. They stood above the vast majority of commoners in each single aspect. Even the non-hereditary knights who earned their titles through merits also operated within the Kingdom with impunity.
Wealth, power, status and more became within reach if one acquired a noble rank. As a citizen of the more egalitarian Bright Republic, Ves and the rest of his state simply couldn't wrap their heads around why the Vesians accepted the rigid caste-like division of society.
When the experts spoke about the noble phenomenon, they simply shrugged their shoulders and explained it was a matter of culture. In other words, every citizen of a kingdom state had been brainwashed from birth to accept such a backwards-sounding structure.