I like this thread topic. To me, when it comes to knives there are "users", and then there are "treasures" (and I think it's fine to have both, or either, whatever one desires).
I regard my "users" as tools (even the $300 ones), just sharpened pieces of steel with handles attached. I own them to work for me, not to pamper them and protect them from any possible harm. And I will use my "users" in any manner that the moment requires,even if it damages them. That being said, if people want to protect their "users" and try to keep them pristine, I certainly would not judge or criticize them for it. I believe that what people do with THEIR knives is entirely THEIR business.
Here's my story of "knife sacrifice" (I've told it here a few times before)-
I was at home alone, in my bathroom. While I was in my bathroom the doorknob decided to malfunction and would not work (the slide-bolt wouldn't slide back out of the door jamb). The bathroom window was too small for me to squeeze through (I'm slender, very small window). I didn't have a cell phone with me and I didn't want to sit in the bathroom for hours until someone came home so they could hand me some tools through the window. The only knife I had on me was a Benchmade Darkstar folder. Not exactly a robust knife. I used that knife to pry the door far enough away from the jamb so I could free the slide-bolt and open the door. It didn't require a lot of prying, but the situation definitely required some very real prying.
I was fully prepared to destroy the $100 knife in the process, and that's what I expected to happen. But to my surprise it survived just fine (so I guess it wasn't really "sacrificed"). I still have the knife and occasionally carry it.