In defending his thought that the dim should not be allowed to have children he says this:
Let\’s say you\’re right, and that\’s why people have children. People want to do lots of things, and in general I\’m in favour of letting people do whatever they like. But not when what they do causes negative externalities for others.
Having a child is of course a huge negative externality for everyone else (there are positive ones for pensions too….).
But essentially his claim is that he should be allowed to decide how many, if, whether, children you have because of the effects upon him.
Not sure what response is really possible here but, umm, fuck off bubba.