It's just a
PR gimmick.
The only way this could be done in a way that the public perception of safety is not undermined is to have a relief captain onboard, which would have to be paid by the bride and groom (or bride+bride or groom+groom if they allow that).
Locos stay up all night trying to brainstorm ideas like fat tax or flying weddings to get a few more cm of press ink.