You pay for the experience and ability. Most of us have premium stones that compliment our skill set and allow us to create edges the factory cannot. It also allows us to create edges with a sharpness most only get to read about
from a business perspective, it's more like they just don't wanna be bothered doing better sharpening on the edges. it's just more expensive and takes too much time.
or we can look at it this way, the people who buy these knives will have to sharpen them up any way.
and it really depends on the user's preference and needs.