I hear what you're saying, Pat but I just don't think that's the case, here. If you haven't bought a 5-pack of shotgun slugs lately, you're in for a serious case of sticker shock! Guys on a tight food budget aren't buying them, they're buying 22LR or 22WMR to get their venison. (Ask me how I know...)
Fact is, there are very few people these days who hunt because it's an economical way to put meat in the freezer. The vast majority of hunters spend far more on gear, clothing, licenses, travel, processing, etc. to ever come out ahead with the venison they harvest. Reality is that quite a few states/locales limit what kind of guns you can use to hunt with. I live in Indiana and we can't use "real" rifles for deer hunting, but we can use shotguns with slugs. More deer are harvested with slug guns in Indiana than all other weapon types combined.
Shotguns firing slugs are very effective, within a certain range, at harvesting deer or any other game animal. That's because they shoot a relatively enormous slug of lead and/or copper, leaving wound channels you can drive an ATV through. Still, they have all the aesthetics and balance of a splitting maul. It's the sporting equivalent of a pole-ax used to kill a steer before slaughter...and that just ain't my kind of deer gun. There are entire states where a slug-gun is what everyone uses to hunt deer, but if you did not grow up in one of those places, it's hard to look at those rented mules and find any love for them. If I can't have a well-balanced rifle of some kind, firing bullets of small to medium bore, I'll just grab my stick n' string and wait for a critter to come a little closer.