Explain why organisational structure is so important in strategy implimentation

It affects how long it takes to get a task done, the risk associated with how your business is done, the communication flow of business, how much red tape is involved in decision making, how much or lack of oversight there is in the work that is done, how flexible your business can be or not, how large a workload can be completed by x amount of resources.... It's really important and the reasons seem endless.