It identifies a lack of a shared understanding of the task. Or framed differently, it identifies when you probably all have the same expectation and you can move on.
Or we can dive into technicalities where it technically does solve the issue but does it poorly, and just happens to be better than any other system we know (also questionable).
i don't say that to suggest it's unimpressive, but rather to point out that adopting his methodology of avoiding anything resembling modern languages and tooling comes at a cost. the cost includes a huge hit to productivity. if everyone built games the way these two suggest, there would be orders of magnitude fewer of games available. if everyone built software the way these two suggest, there would be orders of magnitude less software available. i'm sure they would be fine with that outcome. the rest of the world probably would not.
Your point still stands (there's research floating around proving it) but Blow isn't the best example.