I recall working a homicide, the person that was stabbed died from one stab in the heart with a Case band knife. The knife had no lock. This knife was like the type my grandfather would carry. It was an easy case of self defense. I am sure the victim never ever thought he would stab anyone. He used what he had available. Oh the knife didn't fold on his fingers.
Yes, it can be done.
You can stab with slipjoint and you can stab with a Puukko, but the fact that it can be done without getting injured doesn't mean it's safe.
You can do lots of risky stuff and get away without injury, but there are cases where people did get injured, hence the guards on blades and other safety measures.
Why risk it when you can take precaution not to be at risk anyways?
Don't get me wrong, these knives have their purpose, are good cutters, slipjoints are good for small cutting tasks, they're classy and don't look intimidating, while Puukko's are often amazing bushcraft knives. They can be used as a weapons, but that wasn't their intended purpose and they weren't really designed for such use. I mean, even towel can be used as a weapon (strangling, choking...).
Now, I realize that some people dislike the fact that CS markets their knives as weapons by cutting meat for example. But there are also people who will see value in such test and are looking for blade to either process meat or use it for self defense.
Then we have guard and triad lock, which are in my opinion both safety measures. Guard makes every blade safer for the user, even if you never use it for combat but just for regular tasks. And triad lock falls in the same category, it gives you piece of mind that your blade won't close on your hand and that you won't lose your fingers.
That's what CS is doing right.
