The UNWANTED plentitude of gas warfare

To many of us who see 'death as death', it has always been un-obvious why coughing to death from WWI gas clouds was so much different than being hit in the guts out in No Man's Land and coughing your life away for a half an hour while your comrades are helpless to intervene.

A similar phobia existed against openly conducting warfare with radiation clouds or clouds of fire or germs.