Technology has radically shifted the kill gap. A more technologically advanced soldier can kill exponentially more combatants who have less technology.

And that gap is just getting bigger and bigger until we get rid of that soldier entirely and he is replaced by a robot or drone swarm.

18 U.S. soldiers to 300 enenmys dead(20 years ago) https://en.wikipedia.org/wiki/Battle_of_Mogadishu_(1993)

4000 to 24,000 enemys https://en.wikipedia.org/wiki/Iraq_War

That kill gap is just getting bigger and bigger as the years go by.

American soldiers can use I.R. to 'see through walls'...how can a guy with an AK47 and a canteen compete with that.