As a knife enthusiast and home Chef, I believe that the knife edge should be at top condition. A razor edge increases efficiency in your cooking making it a more pleasurable experience. With a blunt knife you are likely to push and force the knife which increases the chance of it slipping.
Don't bother with the “quick pull sharpeners” they put a rough un-honed edge on but that is all they serve for. Sharpening by hand progressively takes the knife through each grit level refining the blade on each stone to the finest edge possible.