But it will make our intuitions about harm correspond to diminished capability to survive and reproduce well enough. Our intuitions about harm were formed as if for the purpose of ensuring we would avoid impairment to our capability to survive and reproduce, in the sense that our eyes were formed as if for the purpose of seeing.

Darwin then, after explicitly explaining the "as if", made the analogy with a human breeder consciously breeding to a purpose, and then proceeded with anthropomorphic language.