It's hard to explain but it makes her more "real" and open
I image it's hard for royals to be "down to earth" when you are surrounded by people who fullfil your every wish and knowing that even these kind of people can't help but be struck by love in a such "normal" situation.
I mean, you image princesses marrying princes or rich men, so when you see a princess falling in love with a "regular joe" it's so heartwarming...
I just feel that it's much more acceptable for princes to marry commonors and there are thousand fairy tales about it, but it's like the world sets different standard for women...
I'm not sure I am being clear...

I just kind it endearing... It's the romantic in me...
No any prince has married another princess or a rich lady.
The Crown Prince of Norway married a fellow Norwegian, a single mother who was parttime student, parttime working in a restaurant-café.
The Crown Princess of Sweden married a fellow Swede, a gym owner and personal trainer.
The Crown Prince of Denmark married an Australian who worked as a sales director of a real estate firm.
The Prince of Orange married an Argentine who worked for several Manhattan based investment banks.
The Duke of Brabant married a fellow Belgian, a noble, who worked as a speech therapist.
The Hereditary Grand-Duke of Luxembourg married a Belgian, a noble, who worked for an investment company in Brussels.
The Prince of Wales married a fellow British, who once worked as a secretary before her first marriage.
The Prince of Monaco married a South-African, who was a professional swimmer.
The Prince of Asturias married a fellow Spaniard, who worked as news anchor for the Spanish public TV in Madrid.
The Crown Prince of Japan married a fellow Japanese, who worked for the Department of Foreign Affairs in Tokyo.
The King of Morocco married a fellow Moroccoan, who worked as an engineer in Rabat, Morocco.
The King of Jordan married a fellow Jordanian, who worked for Apple in Amman, Jordan.
None of these named partners is of royal blood. None of these named partners add great wealth, jewels, art, estates, influence, alliances or royal prestige to the dynasty, which was - for centuries- the raison d'être of royal marriages. That idea has been abandoned.