This is more of an OAM comment, but...
I don't understand how anyone can look at the human back and the human knee, and all the inherent problems we have with each, and believe in "intelligent design".
I feel like it's more evidence of evolutionary optimization that doesn't need to go beyond a certain point... "Ehh, it's something that evolved from something else and it sucks. But it's good enough to get them to the age of procreation and maybe into their 30s and 40s, at which point they'll get eaten by a bear or something."