If the target is destruction of Israeli aircraft, most of them are in hardened hangers, I doubt a CEP of even 10m is enough to guarantee destruction unless it landed directly on top.Cost and availability of good guidance systems are a big part of it.
Availability is you just don't have the capability to achieve it. Shorter range Fateh-110 are supposed to have a CEP of 100m. Maybe not enough to strike a building but well enough to spray an airbase. Don't know if their long range like the Shahab-3 could have similar precision.
Cost could mean for example that you can have 10 unprecise inertial guidance ballistic missiles or one precise gps guided missile prone to ECM. You add the chance between one precise trying to bypass the defense vs 10 unprecise ones. Numbers against a single building is still not enough if you have over 100m of CEP...
Noted those are sizable explosions, and given that most of them landed within the general area of the Israeli airbase, infrastructure should be at least pretty dinged up.