“Every form of life shares the same DNA encoding mechanisms and that mechanism itself evolved as a more stable molecule from its RNA ancestor. The same five nucleotides, the same 20 amino acids, the same drift statistics in the mitochondrial DNA, the same cellular machinery of ribosomes generating proteins from mRNA copied from the nuclear DNA”
These observations also can be construed as evidence for design.
I see the commonality of biological molecules among life as being due to physics.
These molecules have the physical properties necessary for life.
If there were life elsewhere it would also have the same commonalities because physics and chemistry are the same though out the universe.
You just committed Star Trek blasphemy.
"It's life, Jim, but not as we know it."
If the code can be shown to self modify over time based on the principles of physical molecules why do you still need to propose a supernatural cause?
I agree that the laws of chemistry and thermodynamics would constrain replicating chemistry to certain reactions that only take place at certain energies based on the physics of molecules. But there are many exogenous events that could accelerate or retard the process of natural selection (like meteor strikes, planetary orbital changes, gravitational and electromagnetic fields, and other differences that could vastly change the trajectory of living systems over time.