They represent a link to a rich heritage. It's a matter of historical pride, and a way of seeing a human connection to a past. It's a very white thing, but we gravitate towards hereditary monarchies because of our fascination with lineage as a chain to past greatness. When you think about it, those old British folks in the royal family are part of a long line taking Britain back through the centuries to the foggy dawning age of old Albion.
To an immature mind, it's easy to see them as lecherous and pointless. But that's what (((they))) want: to destroy anything that represents a national pride and heritage.
Nobility and Aristocracy are MEANT TO show the best of a nation, functioning as God-chosen leaders and the human embodiment of a nation's indomitable spirit.
They are meant to be Nietzsche's "Noble Man".
Whatever the reality is, for a world where White and European History is being repackaged and sold back to us as something to be ashamed of, a nation's nobility represent a tangible thread to something great.