We already have multiple options for those low tech munitions. And many are under development as well. Folks have already mentioned this 5-6 times now. On surface to surface missiles we have enough cheap and strategic missiles. Variety of those from ancient stuff to latest ones.I don't shift. I tell you that's a problem for every munitions. But for missiles the problem is much more accurate when they are complex to make.
To mitigate this problem your fighter has to be able to accomodate very low tech munition and of course to go very close to the front line.