Looking at evolutionary facts, Steve Jones tells us that .."About a thousand genes are shared by every organism, however simple or complicated. Although their commmon ancestor must have lived more than a billion years ago, their shared structure can still be glimpsed. It shows how the grand plan of life has been modified through the course of evolution."
The above is from "Darwin's Ghost ... The Origin of Species Updated" by Steve Jones.
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.