No bike I ever assembled in my LBS days ever came with hubs adjusted. It was assumed that a professional mechanic would adjust them properly in the shop during assembly. It's time consuming. Not worth doing at the factory if it drives up cost. Put the parts together, snug 'em up and ship 'em.
If you bought a set of hubs a la carte, those never came adjusted either. If you can build a set of wheels, you should know how to adjust your own hubs, right?