The secondary bevel is the ONLY part of the blade I sharpen before the knife is sent out.
IF this same knife had a single bevel, the entire blade, from spine to edge would need to be sharpened. AND the cutting edge, that is already thin before sharpening, would be EXTRA THIN and actually TOO thin to support the cutting edge.
There has to be metal behind the cutting edge so it can stay sharp and hold the edge. Without metal behind the cutting edge, after a few cuts the edge will roll over and need sharpening again, over and over again.