You refer to “Pakistan” and “Afghanistan” as though those terms have any meaning to many of the people living there. Those concepts are so abstract to the animals in this video; I don’t think they have any interaction with a central government at all over the village level (the village head might, but then only to the next level - provincial). That is part of why this war is difficult to prosecute for the US, and why Pakistan itself can offer little help; many people in the remote areas of these countries live as though there is no border at all, and it isn’t like the LA riots where you send the creatures home by stopping mail delivery (especially of welfare checks) or cutting off power or something like that. The governments do nothing for these people, and the people don’t acknowledge those governments (see Karzai).
Even the Afghanis hate Karzai, they don’t trust him, they know he is corrupt. Massoud was making great headway until his assassination.
We leave and give in to the Taliban we are back to square one again. The country then goes up for grabs to any terrorist entity that will pay the price and they will have safe haven to do whatever they want. Plus do you really want a power base right next to a nuclear Pakistan? They are teetering as it is.