Everyone else's wants, needs and beliefs are taking precedence over that of the child who will be brought into the world . He/she will be born for the benefit/pleasure of someone else, rather than because someone wanted to generously and unselfishly give the gift of life to another human.
PZ: you are taking a very dim view of on of the most noble endeavour in developed life, not just humans.
take the emperor penguins , the males, who, standing in the cold antarctic night for months, huddled together, incubating the eggs, held against their breasts. all for the sake of the future generations.
Of course it is rewarding to see a our families prosper like that too, from courtship to being a grandmother/ father, but just because it has it's ajoy, it is really really hard, persistent work, and not done for y/our personal benefit, but that of others.
not least for l'etat, who will tax the offspring. and
ask the born and prospering child , would they rather have been aborted? never existed?