My point was not that it is always good for a person to procreate. Every person has their own special circumstances that would each need their own weighing of the situation. I would not tell a 16 year old to procreate, for example, and I would also advice against procreation in the case of a woman close to their menopause. Again however, these advices are already more nuanced and based on the specific circumstances of the individual at hand.

My point is that in a general sense, when talking about the concept of procreation itself, it should not be adviced against. In any case not with such a lack of nuance as in that text. I do not regard the "passing on of the problem" to be a valid argument against procreation. The problem is carried by humans as a collective and through the years it has been getting better and better.

Neither do I think that "prevention of potential suffering" is a valid argument. There is no joy without suffering and no life without both. Without bad there is no good. Life is about falling and getting back up. It is the essence of life. It is what gives life its worth. Would you choose not to be born at all in order to prevent your death? What even is the meaning of death if you've never been alive in the first place? To me not being born and death are equivalent: being alive is the short span in the eternity of the universe where you can experience the beauty of essence itself.

I personally can understood when you are 100% certain that the kid will have a birth defect that you might not want to have the child suffer under it. However, in many cases even those people are enjoying life just fine. People with down syndrome are famous for enjoying the little things in life and being full of happiness, despite the suffering.

In any case, the worth of the life of the child was to me a given and not even up for debate. I do not believe that children with bad parents shouldn't have been born. Imagine telling somebody with bad parents "it would be better if you weren't alive". That's obviously not moral. They would agree with you if they hated themselves, but I would not regard this as "good for their mental health". They too deserve a happy life, despite their bad parents. Their life still has a lot of potential and it could still be worth it, despite all the trauma.

So what is left, if the child's life is valuable in all cases? Just the concerns of the parents. And well, you already understood my thoughts on that. On an individual basis you might advice against procreation. In a general sense, never.

I haven't even really talked about the interests of humans as a collective.