cabala, I will trust that you are bemused and skeptical, rather than offended. Therefore I will assume that you are not indicting us, but rather that you are genuinely curious, and I will blame any misunderstandings on a language barrier.
And then I will say this as clearly as I can:
The most simple explanation for why we have this website is: we talk about knives because we enjoy talking about knives. We enjoy owning knives, using knives, and making knives, and we like to talk about those things too. We are not dangerous people, we are not psychopaths, we are not murderers, fiends, or outlaws. To us, this is simply a hobby.
You mentioned the science, and that it doesn`t matter. Yes it does. Not just any person can pick up a solid piece of steel and turn it into a knife, let alone a good knife, and that is a fact. Steel isn't just steel; it comes in many different chemical and thermochemical configurations that are suited to many different tasks, and I'm not just talking about knives.
Making knives is a science, perhaps the most elemental form of science. The sciences and technologies of the world are all descended from the existence of knives and the need for better ones.
It was by making knives that people first discovered alchemy and metallurgy. Those sciences would give birth to chemistry, physics, medicine, logic, and the very concept of technology. Francis Bacon may have been responsible for giving the world the scientific method, but the knife is what gave us an excuse for science in the first place. Even today, sharp things are important and useful.
It is reasonable to be indignant when someone in your life uses a knife irresponsibly, or intimidatingly. It is reasonable to think little of knives, or even to dislike them entirely. But if you are truly frustrated about something, taking those feelings to Bladeforums is wrong. This site is here so that responsible enthusiasts such as ourselves can escape precisely that kind of banal criticism.