Because these children were born, they can reconstruct their lives toward a better outcome.
Abortion is never the solution.
Otherwise, why stop it there? Why not kill an entire race so they can't reproduce since those babies will grow up impoverished anyways?
That kind of thinking is exactly how Hitler viewed it. It's exactly how the Chinese felt about the Hmong. It's not even so much that the Hmong were a threat but the Chinese first had to view the Hmong as inhuman, unintelligent, uncivilized, etc.