We do that, and they'll return the country to the jihadist dictatorship it was before, which also protected Al-Qaeda so they can get away with carrying out more terrorist attacks, perhaps worse than 9/11. Knowing this, withdrawal from the region is not honorable to say the least, and let's face it, you can't base this issue on "honor" to begin with. If it takes covert ops in Pakistan to defeat them, then so be it. If Pakistan isn't willing to take action against them, they they're the one who should lose international credibility. But throwing up our hands and taking off has proven to lead to nothing but disaster.