What a load of sophistic bovine excrement.
Like I've said before, knifes are not weapons unless they are used in an offensive or defensive manner. Period. They are tools. Looking at knives as anything more is an assumption on your part. In doing so, you effectively remove the intent and morals of the owner and insert your own feelings instead. Politicians do it all the time. That is how we end up with badly written laws that punish the law abiding citizen and have no real effect upon criminals or crime.
Sure, knives can be used as weapons. What's your point? So can my wife's cast iron skillet or my neighbor's Louisville Slugger. If his bat is made from aluminum, is it more of a weapon than if it's made of wood? Of course not. Would it make a better weapon? Yes, but that, in itself, does not make it a weapon. Only with action by the owner does something become a weapon.
Let's talk about the term "weapon" for a moment. The defensive aspects of the term seem to all but be ignored. Media and lawmakers both know this and use it against us. Why is it that most people (myself included) first jump to the conclusion that a weapon is something offensive? Maybe this is why we have so many sheeple, now days.
In regards to the bold parts, I think you're position is more a matter of personal philosophy rather than real-world reality.
Philosophically it could be said that a gun/knife/frying pan is not a weapon unless and until someone USES it to harm another person. But the fact is, many items have been designed specifically as weapons, and many items are specifically defined as weapons in the law.
As far as knives, the Gerber Mark 2, and the Fairbairn/Sykes dagger, aren't exactly "utility" knives. Just to name a few.
And then there are items like brass knuckles (and knuckle knives). It's hard to argue that those have any use other than as weapons.
And although I consider many anti-knife laws to be stupid, the fact is- how we define a knife (weapon or tool) means absolutely nothing to the cop who arrests you, or the prosecutor who files charges against you, if the written law considers your knife to be a weapon. If the law says a knife is a weapon, and if it's against the law to carry or possess that knife, then that's all it takes to send a person to jail, where they can then explain to their fellow inmates at length, and over many months, how a knife isn't a weapon, it's a tool.
There is the way we want things to be, and then there is the way things are. And unfortunately here in the US, as well as many other countries, knives are often defined as weapons by the law. And you ain't gonna beat the law with a philosophy.