It does not matter what the motivation of the Pakistani military, in fighting the insurgents, is - I was not addressing that nor is that relevant to the current topic.
My point was simply that when even Indian analysts admit that Pakistan has redeployed over a hundred thousand troops and associated equipment to FATA, to fight insurgents, and lost several thousand soldiers in that conflict, then it makes no sense to argue that the PA/ISI is 'secretly retaining' a few thousand 'guerrilla fighters' to use against India in some future war.
If the PA was that concerned about 'man-power' to fight in a future war against India, then 140000 or 20000 guerilla fighters are insignificant from a conventional military standpoint, given the size of the PA itself. Add in the fact that the PA has redeployed 140,000 troops away from the Indian border and LoC, and the argument of the PA/ISI supporting the Taliban as a 'reserve force' makes even less sense.
Why would the PA move away 140,000 of its own well trained soldiers and equipment if it was that concerned about 'maintaining a 14,000 strong guerrilla force' to fight India?