Just imagine how thick the book of genesis would be if itexplain how the earth and universe really came to be, aswell as the mechanism for how life came to be so complex. The book would be thicker than the bible itself and too complex for people of the day to understand as they would not have the necessary background knowledge.
I agree with everything else you said but I think this might warrant a bit of clarification. If you look to Genesis now, you'll note that it doesn't go into mechanisms. It just makes blanket statements, (i.e. "God did this", "God did that".) It rarely goes into much detail about how it was done. But, where it does provide details, it gets itself into trouble and exposes the conjecture of the authors. For instance, Adam was said to have been formed from a lump of dust, breathed upon by God. Then Eve was created by putting Adam to sleep and extracting one of his ribs. This seems to expose the belief of the time that women were inferior to men and is a complete diversion from the processes of evolution. Theists prefer to cover for such short-comings by claiming the Bible to be non-literal, even in places where it was taught quite literally by the church for tens of centuries. Little by little science is showing the Bible to be wrong and whenever this happens, believers scramble for non-literal readings of the portions demonstrated to be incorrect. The Bible's references to geocentrism are perhaps one of the better examples of this. Taught and violently defended for over 16-centuries by the church, there is no longer any reasonable room to dispute heliocentrism so Christians today are taught that these verses in scripture must be read to say other than what they actually say, (non-literal reading). The Bible's accounts of creation are undergoing a similar transformation from literal to non-literal to cover for the increasing demonstrability of evolution.
This system works so poorly for some parts of Genesis that nearly all the text must be abandoned in order for the non-literal reading to completely cover all of the obvious mistakes in the conjecture of the authors. It usually leads to the complete abandonment of the 6-day chronology upon which the entire account is built.
But my point is that the Bible could well say that God caused the tiny components of life to gather together into a workable form he called "life" and then allowed that life reproduce life with slight variations leading to eventual changes between offspring and parents. It wouldn't be necessary to go into great detail about genes, DNA, DNA replications, mutations etc. Of course that would require that the authors actually held some understanding of how life occurred, how the planet and universe formed and how nature actually works. And one must only read a small portion of Genesis with an open mind to realize that they had less than a clue.
Hats off to the opening poster. Such a conclusion, in my opinion, requires some well-developed critical thinking skills for one so young.