They deal in answers, but ask no questions
Just read an excellent, excellent post on arguments equating abortion with slavery.
If you do take the time to understand the intertwined history of abortion and slavery, it becomes painfully difficult to assert that abortion is wrong. Because then you must defend the slaveholder who wanted the enslaved woman to birth that child so that he could enslave them both (even as he probably used religion and morality, rather than economics and labor, as his excuse and defense for why one shouldn’t turn to abortion). Who would be willing to fault the enslaved woman who aborted her fetus because she didn’t want that child to be a slave? Who would be willing to fault the enslaved woman who aborted her fetus because she physically could not bear the burden of labor and pregnancy? Who would be willing to fault the enslaved woman who aborted her fetus as a punishment to the man who raped her, barely fed her, barely clothed her, denied her religion, denied her liberty, and whipped her when she worked too slowly, made a mistake, or attempted to flee? Who would be willing to fault the enslaved woman who aborted her fetus to protect her life and to save the evils of her life from those of her child? To include the history of enslaved women in the history of slavery and then compare that history to abortion is not easy.
It’s all too easy when you have no interest in the experience of a whole swathe of your co-citizens beyond how useful it is as a cudgel with which to beat your political opponents.