AOA Brother
What you are saying is exactly what I was hoping and suggesting till the last 58 hours or so. In the past 5 days things have moved so fast that what ever had been decided in the various agreements between the Afghan Taliban and the concerned parties has sublimated (Solid state to vapour).
All the Strategies that were made prior were based on defending the Capital and all the major Cities of Afghanistan would remain in the hands of ANA as the ANA is backed by the Afghan Air Force. Once the other cities fell the Afghan Government pulled the entire Afghan Air Force to Kabul to ascertain the World that Kabul is safe and they should keep their presence in form of their Embassies. But in the past 5 days ANA forces surrendered 80% of the territories they had along with all their equipment.
No one in Afghanistan wants an other Civil War hence the ANA surrenders in the hope that the Afghan Taliban would not kill them or their families in the long run. They also might be able to rejoin the Taliban forces in the name of Afghan Army once Taliban have control over the entire country.
Consideration of the Afghan Government was once Taliban come close to or kill ANA personnel they would call upon the USA and NATO to save them and an other war would resume this time by the will of the Afghan Government. Unfortunately this never fulfilled as the ANA did not want to be a part of an other internal or external war.
All the neighboring countries were expecting this as they had seen what had happened in Libya, Iraq and Syria hence they planned on a combined strategy. This Strategy made sure that USA and NATO would not be allowed to fly over their airspace to conduct airstrikes in Afghanistan.
Realizing this Afghan Air Force was ordered to bring all equipment to Kabul and as soon as the Taliban arrive in the outskirts of Kabul Afghan Air Force would destroy them and as a reaction UN would force other countries to give them use their airspace in order to bomb the Afghan's once again any country who would appose this would also be considered as an enemy and War would be declared against them. The countries that would be considered primarily would be Iran and Pakistan. China and Russia both took sides with Iran and Pakistan hence any UN declaration would be Vetoed.
This is the reason USA pressured Turkey who is both NATO and Muslim. If Turkey fails then NATO would kick Turkey out. Being a Muslim Country a war with a Muslim country would only kill Muslims.
Afghan Air Force according to Wiki has these:
Current inventory[edit]
An Afghan A-29 Super Tucano over Kabul, Afghanistan
Afghan
MD 530F firing off its
gun pods
If Turkey and/or Pakistan can secure these assets then these can not be used upon the AFGHAN's at least. The other option is to enforce a No Fly Zone but that would be considered as a War by both Taliban and the World.
Looking at this if the Taliban's are convinced that the Turkish and Pakistani troops would remain to protect the Afghan Taliban and the citizens then they might let them control the Airport and once Afghan Taliban are in full control of the country both Turkey and Pakistan would leave then only this can be resolved without an other civil war.
I understand this looks easy when said but it is a very complex issue.
Do not see Hamid Karzai would negotiate on any power sharing deal specially after he did not accept his defeat in the General elections which would have formed a democratic government in Afghanistan for the first time in its history.