Doesnt a kallah wear white because it is her yom kippur?
Isnt a kallah considered a queen and dont queens wear gowns?
Isnt a kallah covered from head to toe when she walks down the aisle?
Maybe the OP should have read: why is there a wedding if the whole point of a wedding is that a man and woman are becoming one unit to build a bayis ne’eman? Isnt this a very private mitzvah?