Abortion: It's only still a "debate" because the pro-life side refuses to accurately define life, they refuse to define what legal status a fetus should have, whether it is limited as with other minors, whether it shares the same legal standing as the mother, or whether it has its own legal standing yet to be defined, or none at all.
In every case, in which the pro-life side talks about "baby killing" and "murder" they turn around and strip the mother of her autonomy, try to force her to bear a child without the proper medical expertise to even discuss such concerns, and in many cases try to erect laws to punish and jail the woman who chooses to have an abortion in defiance of their attempt at authoritarian control over her and her body.
It is telling then that the entire abortion controversy is still a "debate." It is still a debate because the pro-life side refuses to do the necessary legwork in creating a defensible position.
Here's a not so big secret. Until the prerequisite conditions of knowing the exact definition of life (not your personal opinion but an actual scientific and philosophically sound definition), until we know the precise legal standing of the fetus and its status in relationship to the mother's rights as an autonomous citizen with legal protections, until the discussion can be about what these rights should look like in a civilized society with advanced medical technology and medicine, there simply is NO pro-life argument.
All it is, at this time, is an attempt to control women. Hence, it's still a "debate" in their eyes, because women aren't yet fully under their control. And it will continue to be a debate until they take the questions of a fetus's identity and autonomy seriously.
You know who does consider these things? The pro-choice side. Which is why pro-choicers are in staunch opposition to the pro-life side. Because the pro-life side isn't about saving the life of babies. It's strictly about the control over a woman's body and dictating the rights of a mother's autonomy. This "debate" can never truly end until the pro-life proponents do better and fashion a defensible position. The control, power, and authority over another human being to get your way is not a defensible position.