We like novelty but hate surprises. Changing to new habits and ways of doing things is uncomfortable. We like the familiar. We go back to places we know. Paint the walls, move the dikes, change buildings and people are upset.
People always question their ability to master the new.
Sometimes new ways require new skills that people really don't know. It takes time for new skills, comfort and so on to develop. Rushing leads to disruption, sabotage, resistance and poor performance.