I heard that the gripen has one of the lowest turn around times and can be refueled and rearmed in less than 10 minutes that would be of great benefit in a war situation as you can scatter the Gripen around the country due to it being able to land and take off from public roads as your enemey would target military air bases and airstrips in the first act of any war so this could be a good defence.
What you heard is true and yes Grippen has a very low turnaround time,and need only a few people to refuel and rearm.
But then it was a Soviet era planning from Sweden's military planners who calculated and blatantly told their military leaders during the Finnish war that if the USSR turns towards Sweden,they will have no chance of stopping them,and will have to resort to guerrilla war.
As a result Grippen was built according to that scenario...But then similarly all the infrastructure of sweden's airforce logistics is based on that concept...Their bases are scattered allover the country,and in addition to that they have remote and numerous small units for Aircraft rearming and refueling...There is a whole system in place to use the Grippen's capability to land on public roads and refuel in forests..
Does Pakistan has any such system in place? I don't think so..
Above all,will Pakistan ever risk being over run by an unstoppable Military force who will destroy all of her Airbases to the level that Airforce will have to retreat to forests and mountains? Thats never going to happen...For all those reasons,Pakistan does not need an aircraft with such capabilities.
If IAF rises to such unstoppable strenth,which they haven't yet..the Pakistan may start looking for "A refuel in the jungle" aircraft...but that time hasn't come yet.
Turnaround times can make a difference...Better crew training and small tweaks to existing procedures can cut down the Refueling and Rearming time to almost the same level as Grippen.
For major repairs,such as Engine overhauls,Grippen or not,all aircrafts have to go the shed..No exceptions.