first, if you truly believe that, i have a bridge to sell you in arizona. economists make unwarranted claims buttressed by biased models all the time.
second, that's ultimately a racist argument disguised behind safetyism, neither of which have a leg to stand on. every unwanted child still wants to grow up, be they poor or brown or whatever. let's welcome them rather than paint them over with disgust and wanton disposability.
besides, the point was not to debate abortion, but that it's an (wedge) issue used to distract and divide, rather than focusing the populace on the most pressing problems we face. covid, mass shootings, or climate change (as opposed to pollution) are suitable alternative distractions to consider in place of abortion.