I’m not sure what your point is. There are many common components available to an engineer to design any number of machines that are totally different in appearance and function. Those components did not spontaneously appear or assemble themselves. It took a designer with a deliberate plan. The greater complexity of organisms with a thousand shared genes can be as much an argument for deliberate reuse of general purpose components assembled into specialized forms, i.e. species.
Common ancestor or common designer? The math settled the issue for me barring any new revelations.
Common ancestry is a given fact, and common designer is not out of the question.
The real problem is that scientific evolutionary findings conflict with religious beliefs.