Just wondering why people dull the edge before setting the bevel.
When I first started honing I always dulled the edge. My thinking was that I want to start from ground zero.
Then some one with experience told me that dulling the edge is a waste of metal. I suppose because a dulled edge would require more honing.
Over the last year or so I've stopped dulling the edge and it works fine for me.

I do notice that it seems to be common practice to drag the edge on a glass or a stone.
Is there any benefit to dulling an edge , some thing I'm un aware of ?