Agreed.
Having the great product != bestselling novel.
Having the great product != bestselling novel.
And I like the focus on the "product" side of writing---we read so many articles on promotion/marketing here (though generally on the startup side of things) that we often lose sight of the power of good copy.
Not to say I disagree, I just found the post refreshing, even if only in a "hello world/writing" way.