Because I grew up in an era when all men and most women had a pocket knife on them. It was considered a way of life to have some kind of small cutting tool on you. If a man had his pants on, he had a knife on him. And in those days, it was always some sort of small serpentine jack with two blades. Sometimes a pen pattern. This was normal, and I grew up watching my dad, and other family members solve all sorts of problems with a pocket knife and whatever was around. Some waxed string for a leaking gasket, cutting some branches to get a car unstuck from the mud, cleaning a nice fresh caught fish for dinner.
Between dad, Mr. Van our scout master, Uncle Paul, granddad, I saw how they could manipulate the environment around them with a sharp blade for what they needed. It was some sort of unwritten law in those days that a man would always have a few certain items on him; a knife, some way to make fire, and a bandana or two. We kids had a book of matches or a match safe with strike anywhere barn burners in our pocket, even though we didn't smoke. Mr. Van was fanatical about us learning to do everything with just a pocket knife, and very rarely used our hatchets. He taught us to notch and grove and break off wood that was too thin to break by hand. How to make a shelter with a pocket knife. A pocket knife came to represent self reliance. The ability to get by using what was around us. When you were finally given a pocket knife of your own to carry, it was like a rite of passage, and vote of confidence by your elders, that you were ready to join them in being a grown up. And to take on the responsibility of what that meant.
Back then, there was no modern knives. the one hand knife revelation was far in the future at the point, and all pocket knives had handles of jigged bone, wood, some stag, pearl if it was a fancy one, or even plastic that was jigged to look like bone. You had to pull open the blade you wanted, and it was never a problem. The old companies back then took some pains to make the knife look good. Fit and finish was important then as now, and the scales blended smoothly with the nickel silver bolsters. They had a great warm feel to them, and after a spell of carry they developed a character to them that was their own. Your knife was unique.
I remember when the modern knives came out. I just could never warm up to them. I guess I'm a product of my era. But then I still like my rifles and shotguns tone blued, with nice walnut stocks on them.