Well it was hardly a saintly achievement, was it? Ammonia thus manufactured was used to make explosives in WW1, and its use in agriculture, to which you allude, has caused soil degradation and pollution on a huge scale of land, rivers, lakes and oceans. Oxides of nitrogen are serious atmospheric pollutants which are in part attributable to ammonia production. You could claim that it increased world food production but you can't claim that it improved food quality. Quite the opposite, and its environmental impact was and is devastating. So there's no such thing as a free lunch.