I don't know. Could be many things. Cold be he was narcissistic and thought he had the right to the "best", and a twisted thought could be that a "normal" child is the best. Some people think they have the right to everything and if they don't get it they feel slighted.

Could be like my parents when I was a kid. They didn't abandon me but they tried to change me to be "normal". Because they were so scared, had so much social anxiety that they thought they would be pointed fingers at all day long for not having a normal kid.

Could be that he could have had any kid, and he would have found faults in it (because some people are never happy with what they get).

I guess sometimes people just don't have the parenting gene and unable to bond. I remember watching this show about children born physically different. One kid was born with a really tiny flat nose. The dad in the interview said that when the baby came out of the mother, he didn't think it could be true, and the world was cruel to HIM, to give him this FREAK as a son, he said at first he wanted to throw the baby away! (I was shocked to hear that).

Then there was this couple who got a baby who looked more unusual and there was something not growing right with her scull. She would have to have surgery to survive, but also after surgery she would look more normal. The parents said with a warm voice, that they are doing the surgery so she doesn't die, but the looks, they loved her looks because she was their baby and of course they loved her because... her body and soul.

Two takes of similar issues. Some people are made to be parents. Some are NOT.