i'm not some military dork, but it seems pretty clear to me that if you were about to launch an attack, destroying the runway would be a great idea, because it'd (hopefully) ground their entire bunch of planes at that airbase for as long as it'd take to either repair the runway or move the planes elsewhere. which could be super useful if you had something you wanted to do in the next couple three hours that airplanes could get in the way of.
oth, if you just want to attack somebody solely to punish them, with no further operations planned in the immediate future. it'd probably make more sense to blow up some 20 million dollar planes rather than punch a few holes in a runway that'd take maybe a bulldozer, a roller, $500 worth of asphalt and a couple three hours to fix.