Why do people insist on getting a more powerful cartridge that can add more range?
The vast majority of combat takes place at LESS THAN 100 YARDS!! why would you want to take shots at someone 500 yrds away? Can you even see someone at that range? Can you see them in camo hiding behind cover? Not to mention the people we are fighting today and for quite some time in the future will dress as civilians and act as civilians until they get close enough to detonate a bomb. It would severely hinder the U.S. politically to pop people at 500 yards because " he looked like he had an AK".
Keep your He-Man rifles at home and leave the fighting to the guns that work. The Nazis invented the Jet, coordinated infantry-armor-machinegun tactics, The ballistic missile, And the assault rifle. Where they that misguided in inventing the assault rifle?
The soviets were the most formidable enemy armed force on this planet ( just because we beat them economically doesn't mean they would have seriously messed us up). They invented the infantry fighting vehicle, and Developed the T-34 the first tank with sloped tank armor. I doubt they were misguided as well when they picked the Ak-47 and later AK-74.
battle rifles only work in very limited circumstances in modern combat. I don't think the vast majority of military organizations with assault rifles are missing something.