“Every kind of creature being a unique creation in that is was created and not evolved does not preclude using the same materials and code (DNA).”
No, but to my mind, and those of many people who have studied this subject much more than I have, a common descent is a much simpler explanation. And, as I have said, it is a prediction made by evolutionary theory before we even knew there were such things as genes or DNA, nevermind exactly how much of it was common between organisms.
Also, if God was being a good “coder” and re-used things so dilligently, why would He choose to implement the exact same functions in multiple different ways in different species? No, if God was our “designer”, then he gives every appearance of having been a rather poor and sloppy one.
That presumes on the part of the person sitting in judgment of the designer that they know better and more about how the object should have been designed just by looking at it than the designer did knowing vastly more.
Have we reached the place in knowledge of genetics that we can with certainty that we know all the possible functions of every last bit if genetic material that exists? We may have some grasp of what genes control physical features but what controls emotions, thought, will, decision making?
Defining the physical features and breaking it down to simply the mechanical only tells us about the physical mechanical part of the entity. It doesn't tell us what it really is and there's no way that I know of yet for scientists to say for certain that they plummed the depths of genetics and know all every possible function of eery bit of DNA in every creature.
Tell me then, what's the difference between a living body and a dead one? What makes a body suddenly cease functioning when it's structurally identical to the one minutes before it expired? And I'm not talking about long enough for decay to set in, that argument has been used before. I'm talking about a body that's alive one minute and dead the next.