Wonder why the Church didn't realize that for about 1200 years? And of course, not everyone would agree with you on a couple of points. Life, yes. Human life, maybe. Your conclusion on ensoulment and conception merely state an opinion, not a scientific proof. Which is why many do not accept that theory.
But of course. Ensoulment is an article of faith. Conception is science. Augustine and Thomas Aquinas did not have the tools of science at hand that we do. Hence, they made bad conclusions scientifically which affected their theology.
I've been studying this issue for some time now. The science is clear, biogenesis is the law of the land, new human life begins at conception. These things are not arguable though you can find arguments in "science" texts debating when human life begins. Junk science borne of ideology.
Of course there is junk theology as well.
Nobody gets a pass here at FR. :-}
The Church knew realized it from the beginning, they were led astray shall we say. I can give you more but I'd say God's word would be the deciding factor for those of faith though the Didache and many other early and prominent Christians did not adhere to Augustines views.
Stuff happens.