Ender is an impossible creature and creates an archetype that cannot be lived up to. People make mistakes, it's what makes them learn, advance, succeed, become stronger. Ender is some kind of perverted ideal.
The way this essay describes military strategies makes it seems like those running today's theaters are absolute idiots that simply smash one group of soldiers to another just like the British did in the 1800s. This is not the case. "Attrition theory" is not what's employed in individual battles, pawn-for-pawn style exchanges. The US Army, as an example, takes extremely low numbers of casualties with staggeringly high numbers of casualties inflicted.
Most of these bold claims about Card's novel seem like fluff on closer examination. They're plot drivers for a novel and in that sense they bear a similarity to real-life examples. Nothing more.