It is absurd to hold that a man ought to be ashamed of being unable to defend himself with his limbs but not of being unable to defend himself with speech and reason, when the use of reason is more distinctive of a human being than the use of his limbs.
Also, Lily Potter would have never wanted an abortion, because she was a financially well-off woman starting a family in a happy marriage with a secure place at the top of wizarding society.
The question you should be asking is what if Merope Gaunt, an impoverished and uneducated single woman who escaped from a severely abusive family only to become pregnant with the unwanted child of a man who wanted nothing to do with her, had had access to an abortion and not had immense social pressure brainwashing her into carrying to term?
it got better
It fucking got better.