Yeah, but what have you ever killed with one? Pretty limited in range. The lever is the most useful hunting tool (remember the seven simple machines). The atl-atl, the arm of a bow, a flat spring, twirl it to make a coil spring, the mechanical advantage of the trigger.
Then there are the tools God gave us (or we developed, depending on your convictions). Binocular vision, opposing thumbs. The ability to plan, strategize and anticipate the future activity of prey.
But a good knife or two sure make the hunt complete.