It’s honestly no worse than dropping bombs on them. They don’t have to deal with the explosive shock blowing out their ear drums either. It’s way more escapable than sudden explosions happening all around you.
Besides… if you invade a country you’re down with death. A bunch of the soldiers use rape and attack civilians as well, so my concern for their well being dried up a long time ago.
That and they just stay there active, decades after the conflict. There are still minefields from decades old conflicts that kill/injure people today.