We aren't only fighting Afghanistan, we're also fighting the dregs of Pakistan. It's not just Afghan culture that's the issue here. The border between Pakistan and Afghanistan is extremely porous and fighters cross it at will. Any Afghan casualty can easily be replaced by a Pakistani within a day or two. We'd also have to clean up the tribal areas of North and South Waziristan, and even though they aren't really under government control, obviously Pakistan isn't going to allow that to happen. So do we then nuke Pakistan, a country that also has nukes? I'm sure we could still "glass them", but like...why? For what purpose? None of this shit even matters. The median age in Afghanistan is 18. For Pakistan, it's 23. We've already been fighting there for 18 years, which means a large chunk of the people we're fighting were babies or not even born on September 11th, 2011. We're spending money and time on nothing, killing people who are only trying to kill us because we've been an occupying force in their pointlessly backward, landlocked and isolated country literally their entire lives.