Fine, let's go back to the animated graphic in the opening credits of Enterprise's MU episodes showing the Earth spinning in the opposite direction. Now let's go back to caveman times. In the two universes, there's a tribe of cavemen who contemplate which direction they need go. They choose the direction in which the sun rises, which in the Prime Universe is east, and this sets off chain of events which eventually leads to the world we know, in the MU they go west, setting off a chain of events which eventually leads to the Terran Empire and leather clad lesbians being a thing.How would it not, more to the point? The why (or how) matters more then the what.