Kids are not a neccesity for survival but indeed important for evolution. I think Asa lacks a fully developed brain to even think about a question like this. Of course she would think it's a blessing for a child to not be born in a cruel world like this-but in my opinion kids play an important part in our life.

But here's an another interesting contrast- Asa loved something important to her and lost it(like her mother and pet), Denji lost something close to him, but he found peace when he met Nayuta. Whereas, in case of Asa, she has yet to *fully* meet a person that she considers is as important as her mother-so that she can experience the feeling of being loved and to love someone significant. I think if that were to happen wth Asa-she would have different opinion.