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How could natural processes generate life from non-living materials? Putting aside religion, theology, and philosophy, science looks only at the natural, material processes at work in the physical world and assumes that scientific inquiry pursued on that basis offers the only rational way to identify and understand those processes. Thus science categorically reject supernatural explanations for the creation of life, including human life.

Yet many scientists also believe in God and practice religion with sincere personal faith. In doing so, they recognize that science, even at its best and most powerful, offers only an incomplete understanding of life and of human existence and its ends and purposes. For faithful scientists, the discipline of science can be seen as a way to understand God's rule book for how the natural world was created and works.

We may expect that scientific understanding of the origins of life will continue to progress, perhaps one day even to meeting your demand for an explanation of the precise mechanisms involved. For ultimate meaning though, science is inadequate, leaving that to religion.