When the original discussions about killing an edge came about. I said that it made no sense to make the edge worse before starting to set the bevel. It made as much sense as breaking your legs as your first step for training for a marathon.

Most of the time, I feel the same way about joining or jointing an edge. It's just not necessary. The edge is formed by the meeting of the planes of the bevels. That's it. That's all the edge is. You drag the edge along the corner of a hone and the bevels no longer meet so you have to hone more to get the edges to meet again.

Scratches that exist in the bevels can extend to the edge, where they make the edge slightly sawtoothed. That's not a problem as those scratches are removed as you go up through progressively more fine grit hones. Keep in mind that those scratches are removed by removing the outer layer of the bevels, which means the edge recedes too, but as it does so, the sawteeth get proportionately smaller.

If you join or joint the edge, you still have to get those bevels to meet again. When you do that, you have new bevels with new scratches that make new sawteeth in the edge. Maybe those sawteeth are a little smaller, but who cares? Honing will eliminate those sawteeth without any need for joining or jointing.

Progressive honing up the grits smoothes the bevels by removing steel to make the scratch depth shallower. When the scratches are more shallow, the sawteeth become smaller. Joining or jointing does not change that.