Some argue that killing an unborn child or a new-born child does not actually do anyone any harm. Emphases in bold are mine:
If a potential person, like a fetus and a newborn, does not become an actual person, like you and us, then there is neither an actual nor a future person who can be harmed, which means that there is no harm at all. So, if you ask one of us if we would have been harmed, had our parents decided to kill us when we were fetuses or newborns, our answer is ‘no’, because they would have harmed someone who does not exist (the ‘us’ whom you are asking the question), which means no one. And if no one is harmed, then no harm occurred. Giubilini and Minerva, “After-birth abortion: why should the baby live?” in The Journal of Medical Ethics, 2012.
Just for arguments sake, let’s set aside the fact that a child is destroyed.
Someone is still harmed.
Because children are a reward, not a curse or a commodity:
Behold, children are a heritage from the LORD,
the fruit of the womb a reward.
(Psalm 127:3 ESV)