This illusion results from believing the form to be the essence. This is a necessary device by which Spirit enjoys itself. However, the forming process and the disintegration process are only process. They are not things. Death as we understand it can only happen to things, not to processes.
All form is necessary as part of the process of experience.
In Spiritual as well as Mundane matters, humans have the awful tendency of really believing that the form is the essence. One doesn't have to look far to find this. Churches, governments, families, jobs, words, all are forms which have been mistaken for the Essence. Unless this process is slowed down or more deeply understood, man himself will become more of a thing to be processed and engineered in service of the Form. This is the true Fall, believing words are knowledge and that knowledge is Essence.