That's an easy one to answer. It's the internationalization of industrial products. Cars, specifically, are extra sensitive to the bean-counting influence and bottom-line design.
Half the world drives on the "wrong" side of the road, and a center instrument pod solves the left-side-right-side driver position problem.
Although with electronic instrumentation there is no extra cost, any more, to run wires to the proper side of the car together with the speed and RPM displays.