All around us every day in nature there are what can only be observed as being utter impossibilities (that's not including those "third agencies").
What happens when new-born animals successfully find their otherwise unfindable food source and place of nurture.
Just think of the blind journey to the mother's pouch that confronts new born Kangaroo "joeys".
And then there are the utterly impossible developmental breaks. The plain example is that a butterfly flies away only after they have survived the mysterious separate stages between egg / caterpillar / crysallis.
The various kinds of gaps are simply naturally unbridgeable. Achieving these naturally would require overcoming utterly impossible insurmountable problems.
It's evident that there is no reproduction without "ignorant third agencies".
"For since the creation of the world
His invisible attributes are clearly seen,
being understood by the things that are made,
even His eternal power and Godhead,
so that they are without excuse,"
Prayer. Thank you heavenly Father, for your truly awesome Kingdom Creation.
In Jesus' name. Amen.