Depending on your destination, you will find out that you'll fly over Pakistani tribal regions, Iraq or other unstable areas. Or the Gobi desert or the Arctic ocean. Places where you would not wish to land.

There was nothing particularly strange about flying over Ukrainian airspace, because you don't really expect civilian planes to be shot down, even by rogue militias that are in power in some areas. The very fact that dozens of airlines had been doing that safely all the time that the conflict was there shows that many pilots and airlines did not think there was much risk.

The tragedy here was that there was someone with a BUK system there, and probably that someone was drunk and decided to give a lesson to those blasted Ukrainian fascists. I expect it will be futile to try to get the responsible to a court, because any small fish are already in shallow graves somewhere, to protect the big fish.