I do understand the point you're trying to make Eshmiel.
But, I do consider the likes of planes and chisels as somewhat of an exception
to the rule.
But why are they an exception?
Lurker believes it's a way to force buyers to learn to sharpen because they'll have to eventually - a reasonable point but with an alternative: provide them first with a sharpened plane blade so they know what one should feel and work like; and put a Peter Sefton style DVD in the box (or a link to a Youtube vid) showing how to sharpen.
Should sellers supply lawnmowers with blunt blades to force the grass cutting customers to learn how to sharpen them when it becomes necessary?
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My suspicion is that many not-ready tools are sold that way to cut manufacturing costs, which is to enable a price reduction, which is to attract the naive into buying them as "it was cheaper than that other brand". Unless the manufacturer and seller make that crystal clear, I feel they are conning customers.
Moreover, this "not finishing it" manufacturer ploy can easily (does, in many cases) slip into: make it all substandard to cut costs and let the customers be the suckers who are not given an even break. Not true of Quangsheng planes and their purveyors but true of a vast range of other Tool Shaped Objects flogged in their thousands up and down the land.
Eshmiel.