"Why didn't God make everybody Already-good?" is actually a deep and tough question that cuts to the heart of Christian theology.
Because if God was the Omni-God of traditional, orthodox and classical theology - then it is hard to understand why He so often creates indirectly, via a rigmarole of intermediate factors and choices - which so often go wrong.
To be sure of good results; God surely ought to have 'cut to the chase' and made everything 'right' from the beginning?
So goes the question...
So, if God wanted to make Men Good on this earth - then why didn't he just make Good Men in the first place?
Why make Men so weak, so prone to temptation; why place these weak Men is such bad situations?
Why Make the path from sin to salvation, from earth to Heaven, such an obstacle course?
And the real zinger: Why did an omnipotent God need Jesus Christ to be born, live, die, resurrect and ascend to Heaven in order that Men be offered salvation? Surely it would be much more efficient and certain for God to create Good Men directly into Heaven, without the 'rigmarole' of Christ's incarnation and Men's choices?
Such questions are obvious and (to the asker) valid knock-down arguments only when Christians emphasize that their God must be omnipotent. Valid; because the typical omni-Godite Christian responses to such questions nearly-always come across as irrelevant, weak or evasive.
But I personally reject the Omni-God concept; therefore I believe we need explicitly to conceptualize God as needing Men (and Men's agency) in order to achieve the goals of divine creation.
In other words; divine creation was conceived from the beginning as a work of cooperation between God and men: a work of co-creation.
Or - the 'rigmarole' of contingencies and obstacles in life are not an unfortunate matter; but necessary to attaining the desired results.
My argument it is rooted in the assumption that the essence of Christianity - the work of Christ - was that Men should be able to live the eternal resurrected life in Heaven.
And the assumption that this goal of Heaven could not be achieved by God without the freely chosen help of Men.
So I am emphasizing that God could not create Heaven directly; but only by many intermediate steps involving the free will of Men - especially only by including the work of Jesus Christ.
In other words Jesus Christ is necessary to God's plans, and without Jesus Christ God's plans could not be achieved.
(It is this insistence upon the creational necessity, and not merely the goodness, of Jesus Christ - that divides Christianity from Islam.)
Thus, one aspect of God's non-omnipotence which Christians (I would say) need to acknowledge; is that Jesus Christ was necessary; that God could not do-without what Jesus did - and what Jesus the Man freely chose to do.
The results made possible by Jesus Christ were not obtainable directly; and Jesus was a Man and needed to be a Man; a Man with agency - therefore, we have here a vital example of co-creation.
To put it another way: to get from God's creation to Heaven was not possible directly; but only via many intermediate steps where Men make free choices; and these intermediate steps include the incarnation, death and resurrection of Jesus Christ; and the incarnations, deaths and resurrections of all Men who wish for eternal life in Heaven.
Heaven is the main objective of divine creation; and Heaven is the co-creation of God, Jesus Christ and all Men who inhabit it.
In his most important work, God therefore works-with men, and by-means-of the agency of Men.
God is the prime creator, and all other beings dwell within God's creation - that is what makes God God. But at the same time; the purpose of prime creation is that Men should co-create with God: that Men should (in other language) raise to become Sons and Daughters of God, as close as possible to the creative level of God (although always secondary, creating within already-established divine creation): active participants in the continuing work of creation.
God is not 'omni', God would not want to be omni! - Because the goal of creation is Heaven; and Heaven is made-by and made-for co-creation; and co-creation is an ever-more active, conscious and powerful participation of Men in divine creating.