My Dad will not even use the fishing knife I handled and finished for him. He doesn't want to mess it up, but I'd rather he used it.
But most people do not view knives as something you take care of, no more than you would a screwdriver. If you ask a random person if you can look at his pocket knife it will probably still have the factory edge on it, full of rolls, burrs and chips. The blade can sort of pulverize a cardboard box enough to open it and that's how most people think a knife works. Of those that do appreciate a sharp edge, few have the skills or tools (or mostly, the inclination) to keep their own in that condition, so they wait until it is nice and dull and then they send it back to the mfr or local knife shop. Or just as likely they buy a new one, since they probably have only bought inexpensive knives, and concieve of all pocket knives as basically semi-disposable.
If someone gave you a screwdriver for christmas, wouldn't the giver find it 6 months later in the bottom of one of your drawers or toolboxes, scatched up and with hints of rust, maybe with evidence of being used as a prybar or hammer? Yet if that giver was a member of screwdriverforums.com, he would probably post a similar message up to his fellow screwdriver nerds so they can commisserate about the ignorance of the public on the proper care of screwdrivers.