I think it is safe to assume that an airplane is quite likely to be exposed to the elements, such as rain and ice.
It's not like this grotesquely expensive thing is going to be fixed by Allstate's helping hands of Geico's friendly lizard.
Manned aircraft, especially attack aircraft, are just plain obsolete. If the pilot is sitting behind a console on the ground, his survivability will always be 100%. The plane will not need all the hardware and software to tend to the pilot or crew, either.
It is nice that every human survived this crash, but the taxpayers are still stuck with the repairs or replacement. If they don't replace it, that indicates that it wasn't necessary in the first place.
The Airforce and Congress buy these obsolete pieces of crap because the contractors need the money and the AF generals have egos, and can't grasp that fighter pilots are simply obsolete and lives are risked and training is expended for naught.