Fixed blades are not needed in the backcountry and those who insist that they are lack basic knowledge about backcountry skills.
That's not meant to be an insult. But it's straight up reality. Don't like hearing from me? I can point you to countless books on backpacking and mountaineering that make the same point. Or you can consult the packing lists of people who regularly complete the PCT, CDT and AT.
It's dangerous to propagate false information about backcountry travel. In the Whites of NH, we typically see several deaths a year traceable to a lack of knowledge. Knowledge and proper equipment are needed. With proper knowledge and equipment, a fixed blade becomes an optional luxury item (or excess "bad" weight, if you are doing big miles).
I'll ask you the same question that Shinyedges dodged.
Can you think of a single circumstance in camping/backpacking in which is a fixed blade is needed?
As you think about your answer, here is a shot from a typical winter for me. Temperatures hovered between -5f and 0f all day. Very nice green wax skiing.
This shot was taken several miles away from the nearest trail head. A guy I know nearly died within a mile of here while skiing, as he hooked his tip while skiing solo and got a double spiral fracture in his femur. He survived, in no small part, due to his knowledge, skill and equipment (and a great deal of luck).
Lunch spot by
Pinnah, on Flickr