The writer uses a very narrow perspective and just "assumes" all this can be generalized. One of the most recurring topics in the book is "complexity", but it is just introduced with a narrow one sentence tautological definition without offering any interesting discussion. All kinds of assumptions are taken for granted and not discussed.
So overall, the book reads so far like a bland collection of "do this, don't do that blog-posts". Papers like "Out of the tarpit", speakers like Rich Hickey, etc. offer much more interesting discussions on the topic of design and complexity, and are definitely more argumentative and "philosophical".
I even feel bad for writing something in such a negative vibe about a book. But really its pretentious title lead to such disappointment...