According to Time Magazine: Sensible calculation of real-world risks is a multidimensional math problem that sometimes seems entirely beyond us. And while it may be true that it's something we'll never do exceptionally well, it's almost certainly something we can learn to do better.
Which risks get excessive attention and which get overlooked depends on a hierarchy of factors. Perhaps the most important is dread.
For most creatures, all death is created pretty much equal. Whether you're eaten by a lion or drowned in a river, your time on the savanna is over. That's not the way humans see things.
The more pain or suffering something causes, the more we tend to fear it; the cleaner or at least quicker the death, the less it troubles us. The more we dread, the more anxious we get, and the more anxious we get, the less precisely we calculate the odds of the thing actually happening.