Because we have knives already in our kitchens, and they don't take up extra space in a drawer that would otherwise go to another more useful utensil.
Also my cheese slicers have all been cheap as shit and snap after a few months, and the nice heavy duty one I had with a replaceable wire got lost in the move earlier this year and they discontinued it and I'm sad.
I make knives and I really want to let one sit in honey for a week to see if it gives it an acid wash.
I have other acids that work much quicker, but I'm having a bit of a giggle at making a pattern-welded steel butter knife and calling it my "Honey Knife"