well when your lost/camping/surviving in the woods and just used your last bullet on shooting dinner and have to make a shelter but your first thrust/chop with your cheap knife breaks the blade or cuts your hand and you have no finger and or shelter, I bet you'll be glad you spent that extra money on a good gun
True, but if your like me and enjoy swapping out carry knives all the time, you don't want to be paying $50-100 a pop. There isn't anything wrong with the "cheaper" S&W knifes. They are great for what they are meant for, general every day uses.