To quote/paraphrase Sam Harris, no one would want an 'average' neurosurgeon or even an 'average' carpenter, why the hell would anyone want an average (at best) person in potentially the most difficult job in the world?
Not all humans, just humans in utero. If you're out of the womb, you're fair game - Palin supports the death penalty. There is nothing about her that represents reason, logic or common sense.