That is absolutely true. But even more modest air raids were more effective than these monster guns, in proportion to the resources expended on them. The disruption of the Sevastopol communications systems, achieved by mere Ju 87s, was more damaging to the Soviet forces than the big explosions effected by Gustav and Thor.Indeed. If you are talking about super heavy guns, one shouldn't really compare them to normal airpower, but the Tallboy and Grand slam raids.