Yes, our societies do strive to affirm life as much as possible, and to make the quality of life of our citizens as high as possible. Foetuses do not apply here because they:  a) are not lives, are not human until fairly late  b) if they are born as unwanted children, and the mother is effectively forced to give birth, the quality of life of both the child and the mother will be lowered, and that is what really goes against the principle of life affirmation.