There's a big part of it. A really big part. But not the only part.
I've been to game farms a good bit. That's what we call them in MN, not lodges, resorts, outfitters, etc. I came into hunting as an adult, and can tell you my learning curve was massive. Skye never sniffed a pheasant till she was 3 years old. Our first day ever was on public land. I did go to game farms with friends and it helped learning basics. Shooting, watching the dog, the whole bit was new to me. As I progressed, those trips became less. The last time we hit the game farm probably 2 or 3 years, and usually after the real season closed.
This is just my opinion but when you've gone out and hunted a wild bird, in his territory, on his terms, and manage to shoot and retrieve him, you've really done something. Something you can take pride in. And I think the dog knows that too.
When you go and fork over some dough so a bird raised under a heat-lamp with zero survival instincts, thrown into an artificial field 15 minutes before you jump off the school bus for a shoot, that is only the weakest imitation of the real thing. And the problem is, when people tell others they went hunting, but in fact were only shooting domesticated pseudo-pheasants, that can have a detrimental effect to real pheasant hunting, a watering down of it, making it look so much easier than it really is.
I'll never fault anyone for going to a game farm before or after season. Or living in a state where wild birds no longer exist. But why anyone would drive to a state like MN, SD, IA, ND, or even the highline in Montana, and hunt pen-reared pheasants when the season is open on wild birds is beyond my understanding.