What is the purpose of a bodily resurrection if our bodies will be transfigured anyway?
God created mankind with body and soul, that is how he intends us to exist. Our current fallen nature and the world around us is subject death, decay, and self-destruction. This is not fitting for creation, brought from non-existence into being, to revert from being to non-existence. The point of the general resurrection is to bring everything out of its state of corruption, death, and decay into a state of incorruption, life, and passing from glory to glory.