Totally different usage. They dont tend to stop for long periods of time.
They're also not walking slowly thru a wet muddy field on a 25 degree morning.
Its just very different than sitting in a deer stand or duck blind.
Upland hunting, I suppose, would be a gray area. Most of the pheasant hunters that I know, dont use insulated boots, even in So Dakota/Iowa/Nebraska unless its really really cold. But I'm sure that many do.
I've hiked and climbed and snowshoed in Wyoming/Colorado etc. I've also climbed extensively throughout North America, and Europe. I've climbed 18,000 ft tall, snow/ice covered volcanos in uninsulated mountaineering boots. If I was stationary long enough for my feet to get cold, I was probably already in my sleeping bag. My snowboarding boots and my old ice climbing boots were insulated 'double boots' ...my feet burn up in them.
I sell lots of hiking boots and backpacking boots from the market share leaders. I cant think of a single insulated model.
The only insulated boots in my store are foofy Uggs and Sorels;-)
But, we dont sell hunting boots.