curval, I dont see the humor in it. Ive just picked this stuff up over the years. Mostly from reading the opinions of crime scene investigators and people associated with determining cause of death. Pretty standard fare, plus I have my own hunting experiences to draw from.
Its akin to the debate over hunting large animals with rifles as opposed to using bow and arrow. The arrow, like the knife causes death slowely, as a general rule, by prolonged bleeding (commonly referred to as "bleedout") whereas the rifle bullet tends to be faster, instantly in many cases, and is considered "more human" for what its worth.
I can imagine preferring to die quickly rather than in prolonged suffering agony at the hands of a lunatic. Also, escaping someone with a knife, let alone fighting off someone with a knife, is a very difficult business and you are likely to be severely injured, if you survive.