No matter what sort of work you do, at some point you end up needing a sharp edge. I usually have a small folding knife with me for just such occasions. Sometimes, other people need the sharp edge so I lend them my knife. Now, they can open it fore sure, but almost everyone is confused on how to close the knife.
I even had one co-worker who ended up disassembling my knife trying to figure out how to close the darn thing!
It’s just a skill people seem to not have and they should as it’s a very popular design.
I have included a link to a video which illustrates how to close a knife. The video is not mine.
Sure, but even dangerous tools can be made with some safety in mind. Do you REALLY need a shield for that circular saw? Not really, but those who use a shield risk having more fingers than those who don’t.
Personally, I prefer sheath blades, or a regular old dumb folding blades if absolutely necessary. Are they more safe than other blades? No they are not, but a simple, stupid design is better than one that has been specifically engineered to cut off as many fingers as possible (again, going purely from what the video shows, which looks about as safe to close as a butterfly knife).