Life is really good at finding a local maximum, but not a global maximum. Cheetah's were evolved to be really fast, but they're still slower than a motorcycle.
> Cheetah's were evolved to be really fast, but they're still slower than a motorcycle
A good kick can permanently disable a motorcycle such that it can no longer move faster than a cheetah. Less so for cheetahs- they can heal from wounds. A cheetah is also carrying with it all the needed equipment to turn many forms of raw matter (meat) into fuel to power a cheetah. And many cheetahs carry with them a fully functional cheetah factory.
My point is that humans are great at optimizing one dimension, but to build something that is better optimized in enough dimensions to outdo life is very unlikely.