There are thousands of strikes per day today. The chips needed to control a drone are not the same high cost ones needed for data centers or otherwise. Older fabs work just fine and countries can just eat into their other industries.

Beyond this, if you start attacking neutral fabs you lose out on anything from them. Your expectations are quite a bit off if you think striking fabs stops a conflict.

There are many fabs using "last year's" fab processes for defense purposes. Wouldn't be surprised if they had quick and easy way to set up fabs for chip weapons production in bombed out buildings and warehouses. Defense doesn't need civilian fabs. In the end, we, the civilians, stand to lose tremendously.