Well, I think I understand what you mean. Makes sense at some point but I still think that it is not a right thing about abortions.
I saw enough pictures in my life when fetus being cut into pieces and it looks like it feels pain. I remember myself being inside my mother before I was born so I cannot be agree with the idea of killing babies. Plus we do not know about God's plan A, B, C.. . Sounds good, but nothing is for sure..., nothing is 100%.
The fact is when abortion is done it always will be a fact, real thing, not a theory... no matter how good this theory could sound....
I do not see a big difference really between killing humans on the war and abortions unless the mother has some serious medical issues.
Free will is still a free will.... I do not really understand why by choosing not to kill a baby or to kill a baby we can still be a part of God's divine "plan"?
I do not believe that God wants us to kill humans and to make it a part of his plan.
I do believe that material world had been separated from divine world a long time ago. At some point it was a union but now they are separated. There is no divine order and divine law on Earth anymore. This is what I believe.
Besides, I still think that there is still a destiny or fate. I am not sure how all of it works thogether with our free will and such. It is a very complex subject.