Thanks for this. One of the issues I found with the Agile implementation in my current company is that there's no longer an architectural/technical leadership within the team: the manager acts as scrum master, but it doesn't guide on how things should be done. As a result, as the quoted paragraph mentions, there's progress when the team is well suited for a given set of tasks. But most of the time progress is slow, because the team doesn't want to tackle the boring ones, or challenging tasks that would require the extra mile of effort.
That extends to the leadership of the company. It seems structureless, or "democratic" organizations can only work if the will/resolve/capacity of the lowest common denominator is good enough, and there's a large pool of commonly-minded individuals.