Somehow I'd rather use and lose a knife than never use it at all.
I've played around with my LMF II in this way. It's almost too beefy to lash to a pole properly but at the same time it's so beefy I don't think I'm capable of accidentally ruining it.
I know it works but I always have a hard time believing that a fish is going to stay on the knife without a harpoon like shape or barbs.