EditorApplication.delayCall is a delegate, implying that to append to it, the user must use the syntax EditorApplication.delayCall += () => { };. However, using EditorApplication.delayCall = () => { }; overrides the content of EditorApplication.delayCall with another method. This action results in the removal of functionalities related to Scene view navigation and selection, as they add their methods to EditorApplication.delayCall. Therefore, overriding the delegate eliminates these functionalities from the Scene view.