Survivorship bias and the flip side of things

During World War II, the Hungarian mathematician Abraham Wald, who worked in the SRG laboratory in New York, considered how to minimize bomber losses to enemy fire.

Not all American bombers returned to base.

And on those that returned, there were many holes from anti-aircraft guns and fighters, but they were distributed unevenly: most on the fuselage and other parts, less in the fuel system and much less in the engine.

Researchers from the Center for Naval Analyses had conducted a study of the damage done to aircraft that had returned from missions, and had recommended that armor be added to the areas that showed the most damage.

Does this mean that it is necessary to add armor to the areas that showed the most damage?