To address your last point, my first comment was not really specific to children, none of my comments really have been.
I enjoy thinking about these things. So indulge me.
Life objectively is a choice. There is no denying that.
The question I asked above is, should it be morally okay to negatively judge/discriminate people based on their choices, even for a choice that is societally necessary in aggregate?
At first it might seem like the answer is no - but counter examples are easy to think of. Take drinking water. Producing it is societally necessary. Would it be okay to negatively judge an intelligent software developer for pivoting and becoming a pipe repairman for the local water utility? many would think so! You might think it is a waste of his potential. It would not be considered taboo to negatively judge him for making that choice.
Of course there are differences with child birth, but they aren't relevant to the question I've asked above - which is sufficiently answered. The answer is yes, it's okay to judge/discriminate even for societally necessary things.
Of course, the next step is to take the reasoning farther, and ask more questions. Perhaps I shouldn't lump judging and discrimination together. But I'm satisfied here.
Just to circle back and explain how we got here:
1. I started by pointing out that child birth is a choice and that we commonly discriminate people for their choices
2. Someone responded that it is societally necessary in aggregate and not a choice
3. I showed a simple counter example that it is okay to discriminate against people even when that choice is societally necessary in aggregate
Have a good weekend!