That's comparing oranges with apples.
Operation Zarb e Azb was aimed at a semi-conventional enemy that numbered in the tens of thousands and held land that they taxed, they essentially ran a Government.
They had factories, weapon production facilities, stable smuggling routes, training grounds, fortifications, checkpoints, tunnel networks, radio towers and etc... that we could target and destroy. They operated as a semi-conventional force. Hence why an operation like Zarb e Azb was deemed appropriate.
The insurgency in Balochistan is completely different. They operate as decentralized and loose groups that blend in with the population when the need arises. They hold no territory and constantly shift their positions. They hit military targets whenever they find a good opportunity and disappear, they have no land or objective to defend and hence are not bounded by any limitations. Balochistan being a sparsely populated yet a massive area is the perfect place for these insurgents to thrive, it's impossible for the military to cover such a huge area.
An Operation like Zarb e Azb would hence be completely ineffective as there would be no specific target or objective. The best option is small intel-based operations that target insurgent cells, in fact that is perhaps the only option and that is exactly what the military is doing.
