Life is more like a go-cart than a Ferrari.

It's a shambling, duct taped mess of non-standard parts from lawnmowers and old shopping carts, trying to go as fast as possible while using the least amount of stuff possible. Its an improvised work-in-progress with whatever materials you can use. The human eye isn't a perfect machine, it's a mix of light detection sensors from many species; some of which could stand to be optimized for humans (blind spots, reversed retina that had to be compensated for inside the brain, etc)

The creator set the laws that turn the relative lump of coal that is an amoeba into the diamond that is sentient creatures using the application of evolutionary pressure