Cite me an example. When did anyone ever "attempt to duplicate the functionality of a living system"? And what was the nature of the supposed failure?
"Cite me an example."
I already mentioned that artificial muscles are not as strong as real ones. Aren't you aware that scientists are trying to duplicate various bodily functions artificially as a tool of medicine? This has gone one for many years.
Artificial hearts duplicate the functions of the circulatory system. Artificial skin duplicates the function of real skin.
Do you have a point?