why? The taliban is not like a nation state army, more like a bunch or militias and tribes, each of which is a “bunch of local guys with guns”. As the war has progressed, I imagine they have got more professional, but I’m guessing around 80-90% of their strength are non ideological tribal militias who are very good at figuring out which way the wind is blowing and changing sides. That worked in the US favor in 2001-2 when the northern alliance was winning, and against US interests now, that’s why resistance collapsed so quickly back in 2001 and now.