Anyone who has not cut himself (minor) sharpening a knife is: compulsively cautious, or; doesn't own many knives, or: most commonly, carries about a dull knife, the most dangerous kind to use. A half-dull knife makes its owner try too hard and when it finally slices through its bit of work, there is the tip of one of your off-hand digits just waiting to get sliced off.
That's definitely true. I'm a nut for keeping my knives sharp, from the kitchen to my pocket. A knife is a tool, and only a sharp knife is a good tool.
My pocket knife is a Schrade Old Timer three bladed stockman's knife. A fine tool...sadly, no longer made. I have three brand new ones in their boxes in my top drawer, waiting for the day when I need them. Those should last the rest of my life, since I'm already 61, and still have the knife I bought 10 years ago.