Except that "survive outside the womb" has changed with medical technology advancing, Curtis would have died 100 years ago, 50 years ago, maybe even 30 years ago. It just illustrates how worthless that is as a measurement of human value. It was never good and now it's just being revealed as the arbitrary excuse to kill that it's always been.
So we're cats until birth?
Laws are decided by people, you wouldn't be hiding behind them as an argument if they were on my side, they just happen not to be and can change.