Unsurprisingly heaven is in a different category from earth. There is no moral or natural evil because it is a spiritual realm in which everyone is united to God.
Logic didn’t force God to create a physical world. He knew (through omniscience) that there would be unnecessary suffering in the world but none in heaven, so He could have only created heaven.
btw, “united with God” sounds as if you mean that our individual identities merge with his, which of course isn’t mainstream Christianity.
God is not constrained but He is consistent. It would defeat the purpose of creating the laws of nature which are essential for physical life if He constantly suspended them simply because of disease and starvation that are largely caused by human greed, indifference and selfishness. We do not know to what extent God intervenes to prevent and alleviate suffering and death but we can be sure He does His utmost to do so unless we are hardened cynics and sceptics like Schopenhauer who think this is the worst of all possible worlds. Obviously there are disasters such as epidemics, droughts, earthquakes, hurricanes, tsunamis, and avalanches but how could they all be prevented without depriving us of our freedom to choose what to believe and how to live? If we object to Big Brother observing all our activity how much more constrained would we be if we knew for certain every single thought, feeling and temptation is known to God… How do you know God never or even rarely prevents or mitigates pain and misery? Do you have any evidence? If so produce it.
Again, logic didn’t force God to create a physical world, or force Him into these particular laws of nature with disease, starvation and disasters.
In passing, I can’t understand your claim that disease and starvation “are largely caused by human greed, indifference and selfishness”, as if that could apply to leukaemia, Parkinson’s, sleeping sickness, malaria, yellow fever, etc.
Also in passing, I strongly disagree with your claim that some people must suffer epidemics, droughts, earthquakes, etc. in order to give others the “freedom to choose what to believe and how to live”. It’s hard to put into words how very unjust that would be.
It sounds as if you are the one who doesn’t believe in miracles. Otherwise you wouldn’t have emphasised so wholeheartedly that natural evil is an overwhelming objection to the existence of a loving God beyond all possible doubt. It seems incompatible with being a Christian - unless you agree with Luther that reason is a whore and subscribe to the dictum “Credo quia absurdum”.
I don’t know much about Luther, except that he’s the archenemy of Superman. I only explained the argument, which again, is that natural evil implies that God cannot be all-loving, all-knowing
and all-powerful, that one of them must be compromised.
Your claim appears to be that God is compromised by the physical nature of His creation and the logic of free-will, and so is not all-powerful. It’s not a convincing claim. The physical nature of the world doesn’t stop us from building flood defenses or earthquake-proof buildings to reduce natural evil. It didn’t stop humans from eradicating smallpox 38 years ago. We’re not stopped, yet we’re a lot less powerful than God.
Isaiah’s God does not agree with your claim:
“I form the light and create darkness,
I bring prosperity and create disaster;
I, the Lord, do all these things.” - Isaiah 45
Isaiah’s God is supreme, almighty, never constrained, never compromised. One commentary (Cambridge) has “The prophet’s words are startlingly bold, but they do not go beyond the common O. T. doctrine on the subject, which is free from the speculative difficulties that readily suggest themselves to the mind of a modern reader.”
It’s interesting to look at what various commentaries make of it -
biblehub.com/commentaries/isaiah/45-7.htm