I think you’re going to find human caused deaths to be just as bizarre if you ever look into them. You might think people are generally ok drivers but when you’re looking at each fatality as the worst mistake per 1.5+ Million hours driven people are doing some truly dumb things.

On that time scale you can expect people to have fallen asleep at the wheel several times. They spent literally months looking at their phones rather than paying attention to the road etc. Because here’s the thing most accidents aren’t fatal, for every death you’re going to see a host of accidents that should have been avoided and tens if not hundreds of thousands of mistakes that could have resulted in a serious accident but didn’t.