It has always been petty inter services rivalry. Plus a cultural thing. The PA is willing to accept lower quality stuff if it means they can have gaurenteed access to the system and it’s support. The PAF isn’t. Example the Shaheen missile system, its testing problems were legion, that tge PAF kept refusing to induct it, meaning that we lacked a Ground based deterrent for years until the Army finally took over.
The PAF is also allergic to any suggestion that it has to support the Army, the training for the Cobra pilots had to be done in West Germany, since the PAF was “unable” to accommodate Army Aviation pilots in its training centres, until forced to by Pressler.