Well, it stands to reason. Knives are for cutting, axes are for chopping, so this knife or any other are not gonna be the one for chopping duties. It was designed for soldiers to dig holes in the floor, clear scrub and cut wood for shelter building and fires. Its weight is due to the fact that it has been made to be robust, soldiers can break almost anything. It requires little maintenance, soldiers have enough things to care for as it is. It's cheap, does what it is meant to do and does it well. I also believe one of the criteria was to be able to use it to cut through an aircrafts' skin to aid escape, I don't suppose many of us will be using ours for that though!
As knives go, I've seen people using a lot worse!