Tikirocker, again for what you are talking about it is a SHTF/EOTWAWKI situation probably because of a breakdown in society, or maybe you just have removed yourself from it. Your points are valid but only in a long term situation. Most people are not going to be lost in the bush long enough to need to take down big game for
shelter, clothing, tools as well as sustenance
Most people in a survival situation might just be lost in the woods or bush for a couple of days to a week at most. In all actuality a good knife will probably serve them just as well as any rifle. Any kind of survival situation really boils down to what you carry between your ears more than what rifle you carry on your back.