I just think a lot of people want things very simple, so they only look at the cutting diameter of the head. Of course there is a lot more to be considerd. Overall cut is more important, but so is penetration. Is it better to have a 1" hole all the way through a deer or 12" hole only about and inch deep. That's an extreme example of course but you get the point. Rob also brings in to play the mechanics of different designs such as the snyper and rage, which further complicates the matter for most. I have a bad habit of forgeting that not eveyone is a total equipment and bowhunting nut like I am. Most just want a simple and effective setup.