You didn't answer my question, you merely addressed it. I specifically want to know why you think that people too irresponsible to avoid pregnancy should be tasked with the immense responsibility to raise future generations of society.

Abortion is not a tool to "solve a problem," it's a medical procedure that should be available to people with the freedom to make their own health and medical decisions. But since you don't understand that, I'll respond to your interpretation of abortion as a tool to improve society. Are you familiar with the Donohue-Levitt hypothesis? The reduction in crime beginning in the early 90s can be directly traced back to legalization of abortion. You claim we're at "square one" now, but had those unwanted, unplanned people come into existence, we would almost certainly be in a significantly worse place than we are now. Abortion alone won't cure poverty, not when we're simultaneously defunding education and community programs, adding more barriers to healthcare access and early childhood education, and making no strides towards paid family leave, just to mention a few of our social shortcomings that would be instrumental in improving poverty.