"Presumably, because it came up with the "right" answer?"
The "right" answer, according to the same people who were loudly huffing and puffing that "it won't be the end of it if there's a 52:48 result" - in the other direction.
At this point I suspect that allowing Brexit is the right choice. After 5-10 years Britain will be so utterly trashed that it'll be _begging_ to rejoin the EU and most surviving(*) breixteers will be happily driven into the sea, the NI problem having been solved by reuniting with the rest of Ireland and Scotland, Wales and Cornwall/Devon (aka West Wales) having declared indepdeence in order to rejoin earlier.
(*) The ones whose heads aren't impaled over Traitors' Gate