Not sure which Azadi march you were watching.
Well let me burst another bubble. "Trained Army". An under 13 Pushtun kid probably gets more range time than the common solider. You should see sometimes the work these guys are tasked with. You'll hang your head in shame. Yes there are some fighting units that are primed and ready and available, but most are often deployed. We have a big country with a lot of land/border, so dont think the Army can be utilized at a scale that can crush an internal national rebellion.
Secondly, Army would never fight in such a scenario against its own people. You'd have people refuse orders, and I would think before that group even crosses the bridge, just in the gathering stage, you'd have a Corp Commander Conference - "Sir I think it is time for you to step down and leave on the first flight to Belgium." Another single star would rush to the courts, and IHC would pass an order on an existing case - suspending some old order and either new elections, or judgement on procedural failure would result to pre-NCV. They'll find a creative way. And IK would be asked to take a longer path or stop for tea breaks to give time for things to put in play.
Also if you think Pak Army has enough man power to handle 50/100K armed citizens, you are mistaken there as well.
The idea here is not to get Pak Army to fight her own people, or her people to fight the national army. The idea is to create enough pressure in the system that people at the top make fast decisions on right aligning. Two things: Bajwa's departure (plus house cleaning of his cronies in uniform), election date being announced and all pressure will simply come off, and we can move forward. It is this impasse that is destabilizing the nation.