I can't think of a statement which better says you don't value human life, than one which advocates the use of any nuclear device. You think life meant little to the Japanese, how does that compare to how little the Americans thought of Japanese life? No one deserves to have Atomic weapons dropped on them, especially considering that most of those killed were women and children.
I had at least one family member and a number of family friends who were intensely glad that those atomic bombs were dropped on Japan -- because they were slated to be transferred from the European to the Pacific Theatre to participate in the planned invasion of the Japanese home islands.
The conservative estimate at the time (by the planners) was that the invasion was going to cost
over a million Allied casualties. It was fully expected that the casualties among the Japanese defenders would be on a similar scale ... and Japanese civilian casualties quite probably would be much much worse, possibly even rivalling those in Saipan in percentage of the population. (Saipan, of course, is the island where ALL the Japanese civilians committed suicide by jumping off cliffs rather than be conquered by the invading American task force). On top of which, the entire country would probably have resembled Caen, Monte Cassino or Stalingrad in usable infrastructure left for the civilians to rebuild upon once the fighting was over.
And THAT is why the Allies decided to drop those bombs -- on industrial port cities that were, frankly, legitimate military targets. Of course, in all honesty, when they dropped the Bombs, they knew that they were going to be more powerful than preceding ones, but nobody truly understood just what an exponential increase in destructiveness they represented over, say, a 1000-plane raid equipped with incendiaries or 20,000 pounders... Nobody really understood what the effects of the nuclear fallout would be either on the surrounding population -- as clearly demonstrated by the rather 'casual' attitude they had taken up until then about fallout risk for their scientific and military observers at the first tests...
Bottomline: It is very easy to say in hindsight -- with full knowledge of the effects of radiation, fallout dispersal, blast zones, etc etc -- that dropping the Bombs "should not have happened". But all of that knowledge came either from seeing the effects of the Bombs themselves on Hiroshima and Nagasaki or from witnessing the effects of later nuclear tests. At the time, what they knew was that they had some very powerful new weapons, that if they deployed them they could destroy the Japanese Samurai/military government's very foundation by proving that it was completely helpless to protect its people and thus force Japan to the treaty table, and that if they DIDN'T do that then at least a million more of their own soldiers would die along with uncounted millions of Japanese soldiers and civilians.
Certainly my WW2 veteran friends who would probably have died in the invasion if the Bombs hadn't been dropped have never expressed any regret over surviving on those terms...