Perhaps I've misunderstood the authors intentions? The parts about young people in start-ups, and how it becomes a downward spiral if you aren't in the lucky 10% is such a negative view it hurts. Specifically the "odds" of succeeding and the relative unimportance of the connections you make during that time because [paraphrased] "most of the connections you make in the start-up world are with other start-ups who are likely to fail as well". This is just such a losing mindset to have. If the only thing you are concerned about is not failing then you have no chance to do anything of importance. The choice is yours.
I apologize if I've missed the point here as I know there were a lot of other parts in the article about adding value to your career and understanding how corporate structures work. I do believe those are great things to understand but the tone of the whole thing really struck a nerve.