I have no idea the impact from the pro tees -- it really is a different course back there -- but suggested this a few years ago on here for the members' tees. Because of slope and angles, it's a bit easier to hit your tee shot over to the left but if you go left you face a harder second shot as you must carry the stream hard against the green. If you go right your second shot is easier but that means you've had to skirt the stream the length of the hole.
I suspect they haven't added a fairway out of "concern" the hole would be easier, but I don't know that.