First. Change can result in many digressions, detours, mid-course corrections, and even pettiness. I think people anticipate these unpleasant issues, and are just too tired, too busy, or too discouraged to deal with them. Somehow people would rather spend their energy resisting change, than the energy required to change.
Second. By its very nature change will cause incompetence throughout the organization. Those who were once proficient and even celebrated by the organization for their abilities often discover they are not particularly suited to the demands and requirements of the change. Those already on the edge of their competence are going to resist any change that may finally push them beyond what they are capable of doing. The leader’s job is to help the group to process and then push through these unpleasant and difficult things.
Take Away: Somehow people would rather spend their energy resisting change, than the energy required to change.