It can be something more. For many of us, it is an anesthetic that distracts us from our inner turmoil.
Huh? Like booze or drugs or hoarding, knife collecting can give our conscious minds something to focus on that temporarily blots out something much darker that lies within. This is the only explanation I can come up with for why I have so dang knives. Why I buy multiples of knives. Its why I have 30 or 40 multitools that I never use, and zillions of knives, and guns and flashlights. That kind of stuff. The internet browsing, the hunt, the purchase, the anticipation, the mailbox, the opening and the pocket. Its all a big distraction. Thats why that 30 minutes after you receive the knife - the knife that was going to be your last knife and holy grail - you start to look for the next knife.
A knife can cut stuff. But for those of with The Illness, it can do much more.