It doesn't surprize me, because most people who buy a 30-06 want a rifle that takes advantage of a great round with a plaform that will work flawlessly with minimal effort from the shooter, no matter what level of experience.
I think a Handi, although in the hands of an experienced shooter is just as deadly, but the average guy may find a Handi in that caliber more of a challenge, and not as much a pleasure to shoot, day in and day out.