IME people who say this in the workplace tend to overestimate the importance of one aspect (usually the product development itself) and ignore the importance of things like taking a product to manufacturing, getting technical costing under control, or adapting to user needs. There's a lot of fluff in the article, but this part in the conclusion and your statements about "A people hiring A people" or the example of Linus' place in the kernel all align:

> It’s a competitive advantage to build an environment where people can be hired for their unique strengths, not their lack of weaknesses; where the emphasis is on composing teams

There's plenty of otherwise "10x" programmers who go outside of their strengths and suffer for it.