Tool kits are properly 'layered' much like outdoor clothing. A PSK and folder are equal to your pocket rainparka, mittens and watch cap. The big knife/axe concept is more goosedown arctic parka. And if anyone has overheated in one of these or actually remained cold from poor layering beneath, you understand the potential outcome with a big knife or axe. A preplanned camp certainly goes up easier with a axe, assuming you are rested, uninjured and have lots of daylight. Your notches are pretty, ends nicely squared and everything looks geometrically perfect just like in the survival manual illustrations. But if your tired, sick or injured and it's dark an axe or even big chopping knife can turn on you. In a resource rich woodland scenario it's just not that difficult to break timber and throw a shelter up in short order. It may look like 'Faulty Towers' but thats not what we're striving for. If you are planning a wilderness trip and are familiar with axecraft by all means include one. If not, the various saws and proper knives niched in between Moras and Guillotines will suffice.