I agree with you.
It does seem odd in a modern warship that is filled with electrics and electronics and reliant upon those systems to survive they skimp on the wiring which is in essence the circulatory system of the ship. One potential hit in an area that may be minor in the scheme of things could potentially disable the ship and all its protection and offensive capability. The fire has shown how not only can it cause untold secondary damage, but it can in effect write the ship off.