Collecter, You see, we here are all addicts. We are addicted to carrying a knife. It's just who we are, so even if we go a week without using it, it was still "worth while" to our logic, because we might have needed it. To someone who does not use a knife ever (lots of areas are no-trace areas, pre-packed food, and nylon shelters etc) would not see the need to have a "just in case" item. If the worst thing they can foresee is a slightly uncomfortable overnight if their shelter leaks, or they get a minor injury, then why take a knife? if they expect the trail to be full of people who will at the very least make a phone call to the ranger once they get back to the trailhead, what's to worry?
Do I agree with this attitude? no, I don't, but I'm also an addict, so my response is going to be to re-enforce you're attitude, so that you'll re-enforce mine. On a day to day basis I carry between one and three blades (one of which is usually a SAK or at least an MT)
personally I carry a SAK or MT not for what I will use it for, but what I might use it for. if I know I'm going to need a tool, I'll take that tool! It's kinda like the guys who say that a pistol is for fighting your way back to your rifle, a SAK or MT is for fighting your way back to your toolbox. I've used every tool on my huntsman, some not very often, but I have.
To each his own, as they say, but trashing someone who doesn't see the world your way is a bit narrow minded.
One addict to another, stay sharp!