Why is change so difficult for organizations? Primarily because of the generally accepted myth of business creation. We believe that businesses are made by arranging and rearranging parts; people, departments, managers, et al.
Leaders think of themselves as technicians and architects who develop a plan and fashion the business in accordance with that plan. They imagine themselves as carpenters or sculptors, who impose their will on the "material" and bring the creation to life.
Businesess are not put together. You don't work on them from the outside in, like a potter works with clay. Businesses grow. They expand. They blossom. Like a cell in the womb, they progressively complicate themselves.
Businesses are living organisms that resist foreign materials, including new ideas, just like the human body resists beneficial new parts.