Earlier quoted context omitted.
As a parent of a child who was born with a near-fatal congenital disorder (malignant sacrococcygeal teratoma), I can attest that the decision to try for #2 is a difficult one that we're still wrestling with. On the one hand ours was a one-off event and subsequent kids should be fine. We've always wanted two, and it's been such a wonderful experience that we want more of. So there's that. On the other hand, the months…
To be clear: I think it's unconscionable to conceive a child while there are un-adopted ones, even if it's your first and guaranteed to be healthy. There are perfectly good babies out there that need love and care, and by making your own you are basically saying "fuck them, the one that shares my DNA is better".
I don't think it's unreasonable to assume that my kids will turn out to have traits that I liked in me and my parents. Just because of that, I would rather conceive.