You really are really weird. I never said "swords aren't sharp". There are many technical factors to sharpness. The edge required to shave hair is usually much too thin. So much that just putting it into a scabbard would dull it. While a sharp sword will hold it's edge even if hitting bone, but it won't shave hair. They were and are sharp. Extremely sharp, they will chop off heads and hands and fingers alright. But they aren't thin razor blade sharp. You don't butcher a cow with a razor. You'd have to stop every minute to resharpen it.