Well why would you when it was done for the same reason in the royal courts of europe. Sorry to burst your echo chamber bubble.
A student of history you clearly are not.
In the early to late Middle Ages, royal child marriages were strategic political tools used to cement peace treaties and dynastic alliances. While canon law set the minimum age of marriage at 12 for girls and 14 for boys, royalty often bypassed these rules with papal dispensations.
Notable examples of 6-year-old royal marriages include:
Isabella of Valois (1396): At just 6 years old, she married the 29-year-old King Richard II of England to secure a truce between England and France. On her wedding day, she famously wore a diadem of gold and pearls and brought her dolls to the English court.
Lady Margaret Beaufort (1450): The mother of Henry VII was first married around age 7 (sometimes cited as 6) to John de la Pole; this union was later annulled.
Beatrice of Sicily (1273): She was approximately 6 years old when she married Charles II of Naples as part of a southern Italian political alliance.
Anne de Mowbray (1477): At age 6, the Countess of Norfolk married the 4-year-old Richard of Shrewsbury, Duke of York (one of the "Princes in the Tower").