Without knowing what the silicon lottery distribution actually looks like we can't really say that.
> "... but it's worth bearing in mind that the cost of the product is not just the marginal cost of the materials and labour."
Yes, you could choose to amortize it over every product but then you're selling each CPU for the same price no matter which functional units happen to be defective on a given part.
Since that's not a great strategy (who wants to pay the same for a 12 core part as a 4 core part because the amount of sand that went into it is the same?) you then begin to assign more value to the parts with more function, do you not? And then this turns into a gradient. And eventually, you charge very little for the parts that only reception PCs require, and a lot more for the ones that perform much better.
Once you get to diminishing returns there's going to be a demographic you can charge vastly more for that last 1% juice, because either they want to flex or at their scale it matters.
Pretty soon once you get to the end of the thought exercise it starts to look an awful lot like Intel's line-up.
I think what folks don't realize is even now, Intel 10nm fully functional yields are ~50%. That means the other half of those parts, if we're lucky, can be tested and carved up to lower bins.
Even within the "good" 50% certain parts are going to be able to perform much better than others.