This knowledge can be used to make a cure or an epidemy
>you don't stop fighting until your troops control every inch of their soil because otherwise neither they nor their people feel beaten and like with Germany, in a couple of decades you'll be fighting the war all over again. this is naive. the german call to arms had a lot more reason than simply leftover grudge for the ww1
Keep in mind that fighting to the last man and rebuilding entire armies to continue a losing war only happens in videogames. Countries have economies to run and population to support.
Dont be fooled by the stereotypes that are sold to us all the time like "the japanese were samurais that yould never surrender", sure there were ppl like this, but not in numbers to depose the emperror and drive a nation to a mass suicide/berserk situation.
and now we got completely off-topic, I love
In the long run, a war will exaust your economy and the support of your population. when you fight "to the last man" usually you end in what is called a "Pyrrhic victory" that is a win that cost so much that is not much different from a loss.
The japanese army was already in no contition to do much damage to anyone, specially US since their support fleets were already destroyed (so they couldn't attack american territory effectivelly) and only US had in that time aircraft carriers (I think it was 4 of them at the time).
So the bombs were not "tools to end the war with minimum pain and casualties". That would have happened without them. It was only a way to show off the international community that US have a big gun and is not to be messed with (this and some other factors created the perfect environment for the cold war later, but that is another issue). As a bonus whey could teach in the history classes that ww2 ended with this attack and the D day operation (kudos for US, yay!) and ignore the battle of berlin.
Maybe you had better history classes than me and known this for a long time, but I wasnt aware of the nuances of the ww2 until much later than high school.
I would like to prefer only to treat ppl that are a threat to himself or others
There is never time to do it right, but always time to do it over.