Commercial surrogacy is a disaster and must be banned
Are we morally and legally obliged to raise our own children? It's an odd question, but the answer isn't always 'Yes'.
If you are married and have a child, by virtue of being married it is assumed you are in a position to raise your child. Both morality and the law then oblige you to do so.
This shows, by the way, the close link we make both legally and socially between the institution of marriage and child-rearing, a link many people today want to pretend doesn't exist.