So you think human organisms only gain a soul when they pass through the magic vagina?

With a soul one can think and store memories. There isn't a living soul amongst the over 7 billion people on this planet that has memory from being inside their mother, nor during the birth. It would be interesting to know if anyone have memory from sucking their mother's tit. I know no one that has such memory, because that could be damaging to their personal development. They may have one memory during that time, and that is when the non physical soul emerges with their host the body in this physical world. The rest is blank until they are done being breastfed.

If human beings have souls (which I personally believe we do)

The body and not the soul is affected by the classical mechanical physics view. We have free will, the body does not. The body always operates from action reaction according to its programming. We can program our brain, but we can choose to how to do it, when to do it, etc. The soul is a non-physical entity not made in the physical world, like inside the mother. The body is made inside the mother not the soul.

logically the soul is there from the moment the living human organism is created, at conception.

The body isn't ready to be developed into a baby and to continue to grow at that stage so it is too early for the soul to enter. Also there can be complications which makes the woman's life in danger and abortion is needed. Rape is another reason to abort. A mother would not love and take care of such a child.

God said “before I formed you in the womb, I knew you.”

God did not say that. That quote is from Jeremiah, which he claims are words that came to him. So you misquoted.
Also you ignore science. God does not shape the body, the DNA does.

Also when Elizabeth visited Mary and her baby (John the Baptist) leapt in her womb, she referenced Mary’s fetus as her lord, acknowledging that it wasn’t a mere lump of cells or personal property.

It is completely normal for the fetus to move and kick inside the womb.
https://www.parents.com/baby/development/where-should-i-feel-my-baby-kick-in-the-womb/

You also need to acknowledge that it’s the mother’s body (with the seed from the father) that forces new human beings into existence in her womb.

I relate to facts, not what you want me to acknowledge.
Human beings are not forced into existence in a womb. The definition of human being is a man, woman or child. None of these are inside a womb. You are mixing words and therefor are talking nonsense and therefor making non-factional conclusions.

Since she forced her son/daughter into a temporary state of life dependency, she’s responsible for safely getting her offspring through it.

She has not forced them into anything. It is just a fact that they depend on their mother to feed them and take care of them. The mother needs to feed her offsprings or else they would die. She has the responsibility of her offsprings until they are ready to leave the "nest". That is just how it is and how it works.

That includes the 9 months through the womb

That is not the definition of a child, someone's offspring.
Here is the correct definition of a child:
"a boy or girl from the time of birth until he or she is an adult"
https://dictionary.cambridge.org/dictionary/english/child

and about 18 years afterward (with help from the father too).

It does not depend on law or cultur. Some are ready to make it on teir own much sooner and some much later.

You can’t force a child into your airplane, fly up to 30,000 feet, then declare “my body, my property, my choice” and just eject the child to their death. That’s murder.

Strawman again. You are not reading what I type and you continue to lie about what I type. I said the MOTHER OWNS WHAT IS INSIDE HER BODY!

A soul can only owe its own property, which is the body. The mother owns her body, and therefor whatever is inside of it. The fetus does not have a soul because then abortion would be murder. The baby does not recieve a soul until AFTER birth. When the baby has a soul that soul owns that body, and not the mother. The mother now has responsibility until that offspring is ready to make it on its own in this world.

Have you personally had an abortion that you’re struggling

I have to abort (filter away) a lot of stupidity that people believe in as facts from my head.

They’ll never find peace and accept the truth until they seek forgiveness for murdering their own son/daughter, and forgive themselves.

This is just psychotic nonsense. People don't murder their sons and daughters to know that it is wrong. That is not how this world is, it is only like that in your own mind, which is a mess of incoherent thoughts based on irrationality and psychoses.