This isn't rocket surgery, and it's not a walk in the park. This is a marriage ceremony. With or without all the trimmings, flowers, photographer, champagne, nice clothes, and DJ, it's a once in a life time opportunity for this couple to walk through the door of marriage. They can never back out, even if they separate they are walking forward into another chapter of their life.
If you are in sacred awe of the reality of this, they will be too.