@Will_V Hey Will, I get the instinctual level. Why not at the rational level though?
What organism could have survived thus far (or would survive into the future) by working against its genetic survival?
The way I see it, a man is most functional when he learns to operate according to what he was designed for by nature. And the most basic principle of evolutionary survival is the instinct to conquer, create, and expand over space and time. When a man accepts this everything that was muddled becomes clear, his mind and body (reason and instinct) come into harmony, and parts of himself he didn't even know existed aid him to achieve his goals. His motivation and resilience is endless, he requires very little psychological infrastructure to support him, and all kinds of opposition fail to stop him (in fact he relishes pitting himself against them to gain his reward).
What could be better than that? But instead, to a large degree, modern man works overtime simply trying to hold together enough disparate fragments of culturally fabricated, barely functional worldview to enable him to get up tomorrow and put one foot in front of the other. This worldview is often reflective of an attempt to move the focus of his life closer to his own immediate wellbeing and avoidance of difficulty or burden, rather than what actually satisfies the deepest parts of his nature, if only to relieve himself of the complexity of maintaining it.
I am no expert on what motivates people in regard to abortion. I'm sure there are very many different perspectives coming from all kinds of places of experience and rationalization. But I must admit that my naive assessment, based on the people I have been able to observe, is that there exists a certain kind of situation where someone is unconsciously driven by a powerful negative bias against themselves which may be more or less unconscious - or at least they feel as if more time or opportunities are required to correct some kind of past mistake in order to justify doing the job that nature gave them in the first place, and never asked them to stop doing.
It's not my place to judge someone who is in favor of abortion, nor am I in a hurry to judge something that occurs so frequently to be completely disfunctional or without some kind of blessings from nature, but it isn't in the mission brief that I was given.