What you have missed is that this is essentially a "family" wedding and every family has it's own traditions.
When you are a Royal Princess and Heir to the Thone you do not hie off to the latest "fave" Hollywood designer for the most expensive overblown wedding meringue dress! Neither do you dive into the family jewels vault for the bigest and best sparkly jewels and heap them on just to prove you are royal!
No. You go to one of your country's best designers and get "a gown designed by Pär Engsheden, made of pearl white silk duchesse, and described in news releases as short-sleeved with an external collar. Regal and elegant. Tres chic!
You then lovingly adorn your head with the Cameo Tiara, “Once owned by Napoleon’s Empress Josephine, it came to the Swedish royal family when Josephine’s granddaughter Josefina married the future King Oscar I in 1823. The pearl-covered diadem, heightened by seven cameos depicting mythological figures, has become traditional bridal headgear in the House of Bernadotte. Victoria’s mother, Queen Silvia, wore it on her own wedding day on June 19, 1976.”
Then you affix a vintage lace veil, also worn by your mother on her wedding day to the tiara and you have a real Princess! Beautiful, elegant, glowing with love. A born and bred Royal Princess who gets to marry the man she loves and is made a Prince by his marriage, and who also, upon the occasion of his marriage, became a Knight of the Order of the Seraphim.