We don't know this. We just assume it, so we can blame God for it. But we all had an equal chance at being born a king, or a pauper. And if we humans would distribute power and wealth equitably, no one would be born into either. So again, why are we blaming God for being born into conditions that we created?
Well, of course, we don't even know if God exists, so this is all supposition. But if we assume that God exists and that God is all-powerful, all-knowing, believing that "the Lord moves in mysterious ways" and that "everything happens for a reason," then the implication is that God is acting behind the scenes in order to achieve some sort of "result" as part of a "divine plan."
If none of that is true, then we're back to square one.
Again, we don't know any of this to be so. We just assume it so we can blame God for it. But we humans know where these disasters are most likely to strike, and we know how to protect ourselves from them. But we live there, anyway, and do nothing to prepare for them. So why is it God's fault when one strikes and we succumb to it?
The disasters don't always strike in an expected fashion. However, it's not just disasters, it's disease, or other maladies which affect humans.
And to humans' credit, we have worked hard to prepare for all these things that are visited upon us. We have had to shape and alter our environment, build structures to protect us from the ravages of nature, find cures to diseases, delve into genetic testing (which some religionists decry as messing in "God's work"). We had to teach ourselves these things, learning through thousands of years of trial and error - and most of the errors were the result of people believing in God and believing that we must simply accept "God's will."
When it comes to the "problem of evil," this is where the rubber meets the road. It's easy and convenient to blame humans and our alleged "free will" for the evil of this world, but what is that really saying?
When did "evil" in humans really begin? Was it when we were created? Or is it because humans don't like to feel cold, hunger, pain, or other such travails of life?
Imagine an early human, unable to find food or shelter, yet sees another human who has both but not enough to share. So, the first human decides "Hey, if I kill this guy, then I can eat his food, take over his shelter, and I will survive." According to religion, this human is exercising his "free will" to do evil.
But let's look at this more closely: Why would this person be hungry and cold in the first place? Who designed humans to get hungry in the first place? Who designed humans to require copious amounts of food on a daily basis? If humans were designed so that they could live on a single grain of rice every year, then I guarantee that most "evil" probably never would have happened. That's not because of humans and their "free will," but because of a bad "Designer."
Again, we make this assumption so we can blame God. But we produce these Hitlers by the way we treat each other, and we allow their insanity to flourish until it finally threatens us. So who's fault is it when it grows so deadly that it does finally threaten us, and it takes a world war to stop it?
But people did try to stop it sooner. If we're talking about the "free will" of humans which God supposedly allows, then why would God allow the free will of Hitler to prevail over the free will of those who were trying to get rid of him?
Even back in the Garden of Eden, God set up Adam and Eve to fail. If there's any truth to any of these stories about God, then He must be seen as a master manipulator who messes around with people, sets them up to fail, and then justifies His "punishment" by the abstract notion that humans have "free will," as if it has nothing to do with anything that God has done.