Bottlenecks within the Organization

In looking over Figure 1-2 "How to read a Network Diagram", it is inevitable that central people tend to be considered "bottlenecks" within the organization if the team members are heavily dependent on them. But we need to keep in mind that, bottlenecks are very good at their profession, but yet are overloaded and busy in their work of line, as Cross mentions. This is true in most organizations and this doesn't mean that they are not connected. Take for example, Paul in the diagram. It is said that his colleagues from Finance, Marketing and Manufacturing come to him, but he never goes to them. He certainly must be well established and holds a great expertise and value to the organization. But what we do not see here in the diagram is where Paul reports to. There is obviously a VP or a President of Finance Department. In a sense, in the organization there is a hierarchy of who reports to whom and that if Paul is considered a bottlneck, then his boss would be considered a bottlneck as well since he would also be occupied with a tremendous amount of work he does. Then this would be a continuous pattern within the organizations.