If you put two people together who believe that natural selection is the only important mechanism of evolution and that humans are the only, and best, end product of evolution, then this is what you get.
Watch Robert Wright and Daniel Dennet discuss direction and purpose in evolution.
Now imagine what the discussion would look like if they really understood the important role of chance and accident in evolution and, instead of humans, they used lobsters, ginkgo trees, shiitake mushrooms, rotifers, and cyanobacteria as examples of modern evolved species with three billion years worth of ancestors.
Even worse, think about the octopus. Is there any sane person who would point to the existence of those eight-legged slimeballs as evidence that evolution must have a direction and a purpose?
[Hat Tip: Robert Wright]