Good arrows are far more time-consuming than bows.  Building a matched set of arrows with the same weight, same spine (flex), with smooth, well attached fletchings takes a great deal of time, from collecting materials, straightening shafts, and hafting points.  After this, arrows that are used roughly in the outdoors need to be constantly inspected for damage, repaired, and sharpened.  A good quiver of hand-made arrows would be worth its weight in gold to a primitive hunter.