If God is real, why didn't He save someone who believed in Him from death?

Last week, some guy posted on Facebook about how much he loves God. Out of nowhere, two days later, he died in a car accident. You would think that if God WERE real, He would have saved this guy. To me, this just shows that God isn't real. But of course, believers are gonna run to the "God works in mysterious ways" excuse, aren't they?

If God is real, why didn't He save someone who believed in Him from death?
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