Most people have a utility knife somewhere; they just don't carry it with them everywhere. We've build a world of convenience that does not require a cutting that often. A knife cuts rope great, but when was the last time someone chose rope or string over duct tape? How many people know how to tie a proper knot these days? Scotch tape has a built in cutter, toilet paper is pre-cut, food is pre-sliced, pre-made. If you are willing to spend a few cent more, you hardly have to lift a finger any more. Like everyone on this forum, I like to carry a knife, but I almost have to go out of my way to find a use for in in the urban environment. It'd be different if I worked on a farm, but most folks don't these days.