Well, in scen001, PH has level 10 airfield. Think of it as a base with 10 airfields, and not a base with one huge airfield.
See how many arfields there were in Port Moresby during WW2 (single hex in WITP:AE)
How do you knock out seven airfields in a single day?
Well, considering how Airplanes "need" a lengthy runway on order to get sufficient velocity to take off, and considering how level bombs create quite a hole, across which a plane cannot "run through" in order to take off, if even just a few bombs were to hit a runway around half way, or even 1/3 or 3/4 of its length, eve if the rest of the length of the runway was untouched, chances are that the remaining unscated length without holes in it could not be enough for a plane to take off...
Sure, more then 1 runway can be present at a higher level Airfield but, with 102 hits, one would imagine that they would have hit multiple runways of that Airfield, not just one, thus making them unusable...
I mean, considering the big hole that a Bomb can produce, say that 10 hits would be enough to render 1 single runway incapacitated, then 100+ hits should well put out or order some 10 runways, shouldn't they ?
In the game you'd probably need 3-400 of the 250kg bomb hits to close the airfield(s) at Pearl. Mind you CAP will fly from a more damaged airfield than offensive strikes. As already mentioned, a bomb hit isn't 1% damage on the runway, it depends on the bomb, the size of the airfield and the usual die roll.
I think it's not modelled bad, runways were hard to knock out and not that hard to repair. Just look at the Battle of Britain, the Germans hardly knocked out an airfield for longer than a day or two, if they even managed to do that. Real life wasn't about making the runway unusable it was knocking out the facilities of the airfield and destroying aircraft at the airfield.