Just to point out

Do you notice the trigger finger discipline in the Taliban pictures?
That’s U.S. military weapon safety doctrine on display.
There is intelligence that many of the ANA (Afghan National Army) trainees were either Taliban or tribal warlord troops, sent to enlist in the ANA to get training, and gain knowledge of US weapons, then desert back to their true allegiances.

These people may be illiterate members of tribes of goat herders, but they are not stupid.