The Kepler Dynasty

I need your help with something. I don’t understand the concept of royalty. Oh, I fully comprehend how a family would rise up to rule over their friends and neighbors – offering a safe haven back when defense and conquest were ugly realities of life.
I’ve seen all the movies with good kings (Robin Hood) and bad kings (Braveheart). It’s easy to understand how dynasties rose and fell in centuries gone by. I just don’t see the need for royalty in this 21st century.
Why can’t my family be a 21st century dynasty? I could be King Reece...
Take Prince William, for instance. You remember Prince William don’t you? He’s the eldest son of Princess Diana, of fame for a number of reasons, not the least of which was her fiery death in a tunnel in Paris; and Prince Charles, famous primarily for his royal divorce and his extremely large honker.
I see where Prince William is getting married. And the whole world is glued to their sets to see what church they will select, and what flav