Legal abortion affects how special-needs and physically disabled people are seen by society and cared for, how much choice women feel they have in dealing with difficult pregnancies, and how babies born prematurely are treated. It lets men off the hook for caring for their children, not just granting supposedly consequence-free sex but depriving them of the opportunity to rise and meet the rewarding responsibilities of fatherhood.
Abortion fosters a culture of learned helplessness, where women are not encouraged to fight for their vulnerable little children and abortion is seen as the easiest solution to the "problem" of a child. It fosters a culture where motherhood is seen as an impediment to other pursuits rather than a precious and fulfilling calling.
As many harms as can be halted by ending abortion, we cannot defeat the culture of death by lopping off just that one head. To understand the full breadth of the civilizational threats posed by pro-death policies, we must shine a light on another head of that monster: assisted suicide. (For my purposes here, I will include euthanasia by lethal injection from a medical professional, into this definition).