Geeb, the yes, that solves the problem if you hit a 'fresh' airfield...but look at this scenario:
An airfield has been getting hit by various squads or players, all it down, maybe a Bomber hangar is up, but hey, ammo is down, so no worries. Here comes the M3, after 1 hour of an amazing battle, good defense by the enemy, excellent "valid" tactics by both sides, it comes down to the M3 riding just seconds from release. Poof! Up goes an ammo bunker, rebuild time 15 minutes is up! Here comes some dweeb outta the hangar that just spoiled the 1 hour of a great struggle for both sides, and some suicide bomber just ruined that experience for 50 others.