Then, at the next level above the molecular machines, you have the more complex body systems. I was struck by the asonishing complexity of just the "vestibular" system. While this is an anti-moon-landing video, just focus on 8:45 - 10:33 of this video, describing the amazing complexity of just the vestibular system. Not only would each tiny piece of this have to form at a micro level, but then hundreds of these individual pieces have to coordinate their activity to get this system to work.
Or look at something like our 3-D vision, where we have to have two eyes (each of which is amazingly complex in its own right), spaced an appropriate distance apart. If this happened randomly, then for every creature that had two eyes working together on the front of its head, you'd have millions of variations, some with one eyeball on the sole of its feet, and another on the back of its hand, and an amazing number of possible combinations. Then these eyes work with the vestibular system, as explained in the video above. And these are just two of HUNDREDS of complex systems that are required for the human body to function. Then we have fingers that work together so we can hold things, toes that work together to keep our balance, all kinds of muscle systems ... and this is at the macro level. At the micro level, the complexity of our body systems are beyond our comprehension.