No, it isn’t “that’s just life”. Everything happens because of a reason. We live in a material world made up of countless particles, bumping and slamming into each other, interacting in countless ways according to certain physical laws. Some of these laws we understand; most of them we have no idea and just approximate as best we can with what we know. That’s science.

Grandma got cancer? That is because of genetic mutations, the mechanisms of which we don’t fully understand and may have potential causes that are unknown to us. We just haven’t put the puzzle together.

Tornado hitting town instead of jumping it? A tornado is caused by specific atmospheric conditions. With enough precision in monitoring and observing all the data you could estimate exactly why a tornado lost intensity and stopped touching ground for a period of time. We just don’t because that isn’t very useful to be that precise barring conducting a specific study involving those data points.

The only thing that is ever “just life” is “things changing with the passing of time”. Why those changes are happening the way they are? Well, that’s a lot more complicated than we like to admit we know about.

But as you said, it’s a matter of perspective. Knowing why doesn’t always help prevent it and there are varying opinions on the degree to which we should go for preventative measures as well as how to apply them.