That's a question I've asked myself a lot. I get pretty mad at God sometimes for letting people suffer. I think that's allowed, no lightening bolts from heaven, not yet.
It's interesting that the Bible doesn't really ever promise us freedom from suffering or a carefree life, just the strength from God to endure it all. God never promises anyone total freedom from misery, pain or death, not in this world. In fact, it's quite frank that suffering IS part of this earthly existence.
I can only extrapolate that means that human existence is what it is at this point in time. Many philosophers a lot smarter than I am have put forth the thought that a world without suffering and pain is a world without challenge or meaning.
What seems to be important is how we all deal with suffering and pain of all sorts. I'm not blaming God for it, but it's definitely part of human existence. We cause a lot of it ourselves, don't we? Even when it comes from natural disaster, we make it worse by not helping our fellow man in his time of need.
What if God did wave a magic wand and remove all human suffering? It's kind of hard to imagine, but when I imagine that, I see a bunch of humans sitting around doing nothing much. We'd not need police, doctors, lawyers, politicians, news reporters, nurses, counselors, psychologists, consumer advocates, clergy...on and on. Lots of people would suddenly find themselves without much to do!
Have you ever been on a long vacation and finally run out of challenging things to do? People on cruise ships where there's the option of doing nothing but eating and sleepign often end up doing nothing but gorging at the banquet table and taking naps in the sun all week.
Aside from gainng 5 lbs they do nothing and end up extremely bored after a week of that. That's fine for a week, but living that way would be pointless,boring and a total waste!
I would like to see less suffering, of course, but I also ask myself, maybe it's not up to God to make that happen. Maybe it's up to us. Maybe he's waiting for us to knock it off and quit hurting each other, rather than taking the perogative of learning to change away from us and allowing us to learn to quit doing harm to ourselves and other people.
What would be better for human beings? To just have a better world given to us, or for us to work to attain it ourselves? You don't have to believe in God to understand that it'd probably be better for human beings to learn to QUIT HURTING EACH OTHER without it being imposed upon us supernaturally.
We won't survive as a species until we learn that anyway. We won't be worthy of survival or saving.