I have a hard time believing that the CoE would go for that one. Video exists of the event. None of the commentators were saying that they didn’t look like they didn’t know what they were doing. There was months of buildup. The wedding didn’t come out of nowhere. Megs had a chance to bail well before she took whatever to deal with the stress of walking down the aisle with millions watching. Same with Harry.
What you’re essentially describing is what happened to Ross & Rachel during a Friends season finale where they were in Vegas and got married while drunk.
That is clearly not what happened at Windsor on May 19th this year.
Sorry, but the Xanax excuse isn’t going to cut it. If you stop and think about it, then it would set a precedent for all sorts of annulments within the CoE. For that reason alone, it’s not going to happen.