The use of depleted uranium munitions has been fiercely debated, with opponents like the International Coalition to Ban Uranium Weapons saying there are dangerous health risks from ingesting or inhaling depleted uranium dust, including cancers and birth defects.
Yes, Ukrainian soldiers on front line are worried about cancer and birth defects. They are rational human beings who hope to return to their homes and live long lives and grow healthy children, not some subhumans with only intent to kill, kill, kill, as you wish to think.
I don’t know how rational this is. Given how many soldiers have died so far, if I were a Ukrainian sent to fight on the front line, I wouldn’t expect to be coming back. Rather I’d hope that I contribute to the defeat of the enemy, so that my children or my comrades children don’t grow up under Russian rule. I’m not in their shoes of course. There’s no universal motivation so maybe what you say is more prevalent. That said, this war might not end without soldiers doing a lot more killing so “kill, kill, kill” might be an appropriate viewpoint.