Our free will after creation is one issue people grapple with. Creation of a new person is another. If all people have a soul, then doesn't creation of a new person require God? Alternatives: We do not have a soul till God puts it there, We can create souls independent of God's will (where does it come from in that case, and is it still sacred?) OR God creates the soul, so nothing lives unless he wills it.
All humans have souls. God gives them a soul. If someone wants to create a life while shutting out God, that does not mean God does not infuse a soul. It means the persons involved have said to God they wish to be a god as well. It violates the first commandment.
"If all people have a soul, then doesn't creation of a new person require God?"
Yes.
"We can create souls independent of God's will"
Nope, only God creates a soul.
"God creates the soul, so nothing lives unless he wills it."
Yep. Remember, God has an ordaining will and a permitting will.