Well, specifically I was referring to some biochemical mechanisms that exist that actually have much shorter and more direct synthesis pathways; yet nature chose a more convoluted path. In these cases there is nothing gained in the convoluted path other than the consumption of more resources. In this instance; if humans can design something better than the UI, than the UI isn't really a UI. Or to put it more bluntly; if we can do something better than nature, than what does it say about nature?-But the final question is: can we do better. we haven't so far.