I just think something like GOD is probably going to be too far out of reach for us to attempt to predict his actions. — I don't get it
So contrary to what you assert, you are playing the radical sceptic card. You are proposing that, as far as we can know, being sadistic and/or wholly unconcerned for the welfare of others might constitute a moral virtue in God. That's absurd - as absurd as thinking that 'for all we can tell' it might constitute one in us. Even if it is possible, it is not remotely reasonable to believe it. It is beyond a reasonable doubt that being good does 'not' involve being sadistic and/or wholly unconcerned for the welfare of innocent or guilty others. Therefore, it is beyond a reasonable doubt that God is not wholly unconcerned for our welfare, not if we're innocent anyway. and thus we can conclude that it is beyond a reasonable doubt that we are not woodchips from God's treehouse. I now fail to see how you can't see this. Your proposal - that, for all we can tell, we might be woodchips from God's treehouse - has been demonstrated to be false beyond a reasonable doubt. And invoking - in an ad hoc manner - scepticism about what goodness in God might consist in is just silly and doesn't begin to raise a reasonable doubt about my thesis or do anything at all to restore credibility to yours.
So are we just woodchips from God's treehouse? No. God is good and omnipotent, and good people are not indifferent to the fates of innocent sentient creatures, or guilty ones.
We can know this by reflecting on the nature of goodness, but we can know it by reflecting on God's omnipotence as well. Our actions often have foreseen but unintended consequences. But that's because we do not control all of the consequences of our actions. God, by contrast, controls them all. Everything that happens either happens because God causes it to, or God intentionally permits it. Nothing that happens that God causes to happen is anything God is indifferent towards. For if God were truly indifferent to it, it would not occur. And when it comes to what God permits, rather than what God positively causes, he would only permit indifferent events - that is, events towards which he is indifferent - when doing so is a consequence of our free will being exercised. And he is not indifferent to that, even if he is often indifferent to what we do with it. But anyway, the world we live in is not a world we ourselves have freely created or freely placed ourselves in, and so the world we live and the fact we live in it has to be concluded to be God's doing, not ours. And as nothing God positively does is anything he is indifferent to, we can once more conclude that our being here is not a mere foreseen but indifferent consequence of something else God was doing, but is instead fully intended by God.
Thus, once one acknowledges that an omnipotent and good being exists, there is no reasonable way to escape the conclusion that our lives here serve a purpose, and a good one at that.
You act like I'm stupid and don't know anything when I say "God could put innocent people with dangerous, corrupt people, because his understanding or his morality is perfect and your's is not" — I don't get it
Yes, because all you're doing is pointing to a metaphysical possibility, not providing evidence that it is true.
There's what is possible, and there's what is actually the case. It is metaphysically possible that Elvis shot Kennedy. But it would be wholly unreasonable to think Elvis did it simply because no contradiction is involved in the idea. Brute possibilities are not evidence. They are the last resort of someone who has run out of evidence.
Similarly, as all things are possible with God (for all things are possible with an omnipotent being), it is indeed metaphysically possible that our lives here serve some purpose other than the one I am defending. I have at no point denied the possibility. What I have done is show that it is reasonable to suppose that our lives here serve the three purposes I described, and entirely unreasonable to think otherwise, at least after being confronted with the evidence.
For an analogy: a detective provides you with some very good evidence that Lee Harvey Oswald shot Kennedy. You reply: for all we can tell, Elvis might have done it.
Is that reasonable? No. Yes, it is metaphysically possible. And no amount of evidence that Oswald did it will establish the matter with 100% certainty, for deception can never be entirely ruled out. But is it at all reasonable stubbornly to stick with the absurd Elvis thesis on no better basis than that it 'might' be true? No, that's not reasonable at all - it's dogmatic and silly.
I think there is no amount of evidence I could show you that would convince you that our lives have the purposes I described. For whatever the quantity I provide, and whatever its quality, it is going to remain metaphysically possible that they serve another purpose, or none at all. And that, it seems to me, is, for you, sufficient to make it perfectly reasonable to reject my conclusion. Which is, of course, wholly unreasonable of you. But then unreasonable people abound here, do they not? This is a world full to the rafters with them. It's almost as if it was a place God was putting them!
To paraphrase Empodocles and Yeats, there's an oracle of Reason, an ordinance of the God, eternal and bound by broath oaths, that says when a soul foreswears Reason to follow its own path, it must wander, for thrice ten thousand seasons, away from the abodes of the blessed, and be born again in a multitude of mortal clothes. The air will drive it into the sea, the sea will spew it onto the dry earth, the earth will hurl it into the blazing beams of the sun, the sun will fling it back into the eddies of the air. Each will pass it to the other, but all will reject it. We are such exiles, wanderers from the God and the Good. And though we are fated to spend lifetimes searching through these hollow and hilly lands, the day will come when we'll find our way back to the orchard and the stream of forgetfulness where it all began, and then we can wander once more in its long dappled grass and pluck, till time and times are done, the silver apples of the moon, the golden apples of the sun.