I don't know the type of outdoors men you know, but I'm 41 been hunting, fishing and spending as much time as possible out of doors pursuing those past times since I was 9. I wish I could count at how many knives have been lost, stolen, damaged or rusted out. Most everybody I hunt and fish with the same, knives have a way of dissappearing in the mud, muck, water and woods. when a knife is being used to re work a busted raditor house on a mud boat stuck in a ditch in the marsh and it gets bumped by the dog or someone else in the boat, your not finding it. Same thing goes for the cut away knife that usually rides up on the bow so you can cut yourself free from a rig when off shore in case the weather picks up or the rig siren sounds. Moreover your not undoing the cut away knife as you hop from rig to rig all day, so the stainless clip that you use to hold it to the bow rail usually rust out and whamo teh knife goes overboard. I can't tell you how many tips I've snapped while putting in, taking down or moving deer stands and sorry with everything else I carry I'm not carry pry bars and screw drivers, get real.
So that thing about outdoors men going their whole career with one simple knife, then their not doing much hunting or fishing or their not doing it in brackish marsh, swamp, palmetto hardwood bottom or off shore, sorry but their not. I've literally had my bacon saved by a knife on at least 2 occasions that I can vividly remember.
Lastly what if the balloon goes up, no really, the economy collapses for whatever reason, we have a nuclear, chemical or bilogical attack here in con us? Knife companies go under, you go broke, you don't have the money to run down to walmart and buy another one, etc. Your forced to start living off your yard, growing goats, a garden and chickens, ducks, or other fowl. You have to start basically a small urban farm. Your going to NEED knives and the knives you have are going to start really getting used. Think one is going to last you? What if you have a theft, loss, breakage, damaged, etc. Think you may want to have some back ups, what if you have kids and a wife there going need a knife or knives as well.
Do you have one flashlight at the house, what about in your vehicle have one there? I've got extra of everything and buy lots of things in the same make and model so if they all break I can cannibalize them for parts and probably put together a few working pieces. Sorry to vehemently disagree with the OP but I think if your operating in todays society under the misconception that things like a good folding and or fixed blade is aren't really needed or one only needs one to last their entire lifetime is sadly mistaken and really flying by the seat of their pants and hoping that everything is going work itself out.
I was a boy scout so I believe in being prepared, that it is better to have it and not need it then need it and not have it and ultimately that 2 is 1 and 1 is NONE.
To all those here that feel as though they have too many knives, flash lights, tools, etc. please contact me and make arrangements for me to take those UNNEEDED items off of your hands and put them to good use.