we now have the capability and enough science to do that, the wrong way would be to deny the boy any chance just because nature didn't give him. What would be over the top is trying to save for example an acranial foetus, those would be just blobs of muscles and tissues with no purpose, but a baby, even with this kind of a defect, would be perfectly healthy at birth because of the adequacy from the mother's side, if we can intervene it accurately and effectively there, then there's a very good chance that the child would grow up normally, even though they will need a higher cost of maintenance, in the end it will be worth it if we can tackle just one more severe condition considered unsolveable in the past, this is called progress
btw Suzy, with your line of reasoning, considering that a lot of autistic children are born with severe defects as well, i.e. rectal problems which needs surgery, wouldn't we deny those children the chances as well? Even though I am, for every reason there is, in support to reduce the chances of mentally incapable children to be born, the only way that I'm ok with is only to choose carefully the embryos to be developed. To deny the chances to survive for those who are already developed is first, against the law in every nation and the UN declaration of Human Rights, and secondly would be very immoral and against the ethics and the expectation from society to doctors, and everytime we doctors do the oath there's the line of "trying to preserve life as long as it is feasible"