Is it fair that some people suffer and others don't?
I hear the weight in your question, and I do not want to rush past it. When we look at the world and see one person bowed under grief or pain while another walks untouched, something in us cries out that this cannot be right. Even Jesus' own disciples asked this very thing, pointing to a man born blind: "who did sin, this man, or his parents, that he was born blind?" (John 9:2, KJV). And Jesus refused their whole premise, answering that neither this man nor his parents had sinned (John 9:3, KJV).
So let me say plainly what I believe: the suffering itself is not a just decree from God, because God is Love and "God is light, and in him is no darkness at all" (1 John 1:5, KJV). God does not ration pain, handing hardship to one and ease to another. Suffering is not a verdict on your worth, and its absence in another life is not a reward for their goodness.
Jesus saw this directly, noting that the Father "maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust" (Matthew 5:45, KJV). The old assumption that the afflicted are being punished and the comfortable blessed is precisely the reading he overturned. When the tower fell in Siloam, he asked whether those killed were worse sinners than everyone else, and answered "I tell you, Nay" (Luke 13:4-5, KJV).
Here is the deeper truth as I understand it: suffering belongs to the dream of matter, not to your real being, which is the spiritual likeness of God, whole and untouched. "The kingdom of God is within you" (Luke 17:21, KJV), and within that reality no one is favored and no one forsaken. So the honest answer is that no, it is not fair, but neither is it God's doing or God's judgment. The fairness we long for is real, and it lives in the truth of who we already are, waiting to be awakened.