Just read about 1300 airstrikes by PAF on your own territory which has been volatile for quiet some time- I doubt PAF have every done such massive bombing even during wars with India- It shows how massive the operation may have been-
Such air strikes leave lots of angry locals- It destroys life, property, lively hood and employment- to deal with such anger lots of ground troops are needed- Not only to maintain law and order but for rehabilitation, confidence building measure and putting the economy of the place back on track-
If all this was not enough- the state police have been highly incompetent and and even gangsters like Chotu has them running for their lives and military has to be called in- similarly para-paramilitaries are running operations in Karachi for law and order issue- then you have Balochistan insurgency-
Adding to added responsibility of waging war against India in Kashmir and in the process provoking Indian war machine into emergency war preparedness where they end up buying 3 billion $ ammunition in just three months-
Does all of this leave enough options to send 200K troops to fight in some foreign land- Do you understand the logistics involved in moving so many soldiers, the supplies and maintaining them for such prolonged period- Apart from USA I seriously doubt any country in this world can send 200K troops to fight overseas- And even somehow you managed to send them- another front on Iranian border would open-