Ask on a bushcraft or knife forum and you will get more responses than you can likely read... those who frequent such forums tend to believe that with a good knife (usually a fixed blade knife strong enough to baton with)and a head full of know-how one can "survive" in the wilds by making fire, building shelter and possibly procuring food.
Maybe you can, but I have no idea when/why one would need to do this... if you are lost, learn how to use a GPS/compass and map. Carry a cell phone or sat phone if you are really worried. There are very few places in the lower 48 that one cannot walk a straight line and in a few miles hit a road... if you are injured, I doubt you'll be able to hop about wacking stuff with a knife to help you survive. In a real situation, you need to be try to be rescued, and not build spend your time making deadfall traps.
That said, I do carry a knife when climbing and would if boating... ropes can cause problems and do need to be cut. However, I do not need some $300 Bark River or even a cheap Mora to do this... i carry a cheap serrated folder with blunted tip.
Caveat: the above is just my opinion- not trying to start an argument, though I do get annoyed when I see trees and saplings cut down in large quantities by those practicing "survival skills".