See, this is not a chicken and egg situation, as I have said leave your personal feelings for the current of crop of politcans to one side. Your complaint that there are no properly qualified civlian leaders is rather moot as how do you expect to get such qualified people into politics with the current situation? The present day system is not designed as a mertiocracy, the best are not rising to the top as the ebst likely never saw politcs as a viable option for them and if I'm being cynical I would say the Pak Army has designed the system in such a way.
No leaders are magically going to descend from the skies and be incorruptible or different overnight, there is a saying that one gets the leaders/government that one deserves. But this is not a call to give up on the entire process but to demand better. Calling in the army or relying on them to somehow correct the course of the nation is not going to fix anything, it may put a bandaid on the problems but will never address them. The system needs to evolve organically, there is no magical bullet and as bad as the leaders you may have may be they are what you have and you need to make it work, washing your hands of them and providing legitimacy to a coup is replacing one set of seld serving induviduals with another except this time they have a stronger PR strategy and are better at hiding their negatives and demand no accountability.