Basically, it's the century old Kephardt pattern, and was used over 100 years ago for field use by people who didn't have sleeping bags, gas powered stoves, or 2 pound three season shelters. They also used axes to build substantial shelters, something stout enough to keep bears out. Nobody then expected a big knife to get that kind of work done. The fantasy of "survival" training was all too much the reality of what they really had to face.
If a real survival knife is what is wanted, looking back at what people who actually lived in the wilderness would lead to a better decision than relying on the marketing hype of commercial offerings that sell in tactical magazines.