I disagree on the bold part - modern HAS and runway repair teams/redundancies make neutralizing a difficult task. Temporary halt of operations is more realistic.Most of the respected members use a term "gap".
If we are considering qualitative or quantitative gap between PAF and IAF capabilities, then on papers IAF has the upper edge. However, the ground reality is "apparently" different. At present, PAF has enough fire power to bring IAF into its knees.
The average availability of air platform is more than enough even for Mirages and older F-16s.
Turn around time is low, hence PAF can generate sufficient number of sorties per day.
Almost all air bases 1000 km away from Pakistani border can be targeted and neutralized as soon as possible.
If gap is in the "type or capability" of air platform PAF have, then in my opinion, after induction of JF-17 Block 3, PAF will have sufficient capability of 4+ gen jet fighter aircraft. Therefore as stated earlier PAF may stick to their plan about considering induction of 5 gen aircraft instead of another 4+ gen aircraft.
Additionally, mission success rate for such an endeavor revolves around having a strike fighter capable of fighting its way in and getting out. Escorts and support assets make that easier but it still doesn’t help when the survivability of the primary strike asset(M3/5) isn’t very high.
There is a strong reason why the PAF even with access to F-16’s wanted the M2k, then settled for the J-10.