I see your point, Erik, BUT

my point was really, what if a mediocre knife fighter was up against an excellent empty-hands fighter and they could balance each other out? Now put the excellent empty-hands fighter up against, say, a mediocre swordsman !! Isn't this where range comes in? Yes, it is a lethality point as well .. no refuting that at all BUT even with no weapons involved that point is very valid .. martial arts is about lethality in itself, isn't it?
Yes, martial arts are, and so are weapons. Both are tools designed for the same purpose. Note in your example how you combined "excellent" and "mediocre" - the juxtaposition is necessary because the weapon makes the armed person more dangerous, and a significant skill disparity is necessary to overcome that advantage. We invented invented weapons to make ourselves more lethal. We invented systematic ways of fighting (with and without weapons) to make ourselves more lethal. Either can overcome the other, but one is a whole lot easier to acquire.

My point with Sokeydokey was basically how would my opinion change of someone carrying a weapon - range - because him carrying a knife may or may not make him more or less lethal to me BUT if I can keep my range from him I can negate the weapon. Does that make sense?

Having a weapon certainly makes someone more lethal. A bad empty hand fighter can only do so much damage with poor form. Maybe he'll get lucky and catch your cornea with his fingernail, but the odds are slim. A weak strike may hurt him more than it'll hurt you. A bad fighter with a knife only needs to make physical contact to do serious damage. No matter how weak his techniques or poor his alignment, any contact is potentially lethal. The same is true to a much lesser extent with a bludgeoning weapon - more than mere contact is required to cause harm, but building up momentum with a stick is pretty easy, and hitting with somewhat poor alignment is much less likely to damage the attacker than if he were hitting empty-handed (granted, if he's doing something incredibly, terribly, stupidly wrong, he could hurt himself by hitting you with a stick, but let's assume that the attacker has the basic coordination skills necessary to carry him through the day). Range is one way to make a person more lethal (by making him safer from counter attack if nothing else), but range isn't the common factor for all weapons - the increased danger is. Brass knuckles give me a fraction of an inch of additional range, but they're still cause to make an opponent more careful when fighting me because of the additional risk.