Very sensible. While libertarian and anarcho-capitalist outfits like Reason and Freakonomics may have strange views (and sometimes held climate denial views), they do also sometimes offer uncomfortable, factual truths.

Unfortunately though, the US lacks a fair and equitable universal healthcare system and doesn't really care about imposing absurd externalities on individuals who lack health insurance or the means to side-step the narrowing separation between church and state. Birth control access isn't free or universal in the US. And, it would be unsurprising that a considerable fraction of lower-income women in physical relationships are less able to insist on using birth control at all times. It could also be that higher-income women worry more and have the means and assertiveness to make different choices.

Perhaps the root cause is when kids are born, regardless of public policies or personal choices, that aren't wanted, aren't loved, and lack sensible parental role models, they end up in worse circumstances and have more problems in life.