I'm no expert my friend, I just speak from my experiences over there. Everyone is entitled to their opinion, so what I have to say shouldn't have more weight than others.
To answer your question, we should have pulled out one Bin Laden was killed. Anything after that dude was killed, was unnecessary. That was our goal right? Kill the baddy that wronged America and say mission accomplished. Well we did that, but in the process of finding the cave dweller, we discovered Afghanistan was the poster child for a humanitarian crisis. Poor economy, mistreatment of kids and women, no real form of democracy, etc. The more we dug, the more we uncovered. After 20 years of being a literal staple to their government, of course things will suddenly turn to what we are witnessing if our presence just up and left.
@bennbeckman