Even with all that aircraft-impact resistant, highly reinforced containment, crazy off-grid redundant safety systems, and paramilitary guard force a few hundred

Even with all that aircraft-impact resistant, highly reinforced containment, crazy off-grid redundant safety systems, and paramilitary guard force a few hundred strong? Honestly I can see how they might be intriguing at first, but after quick consideration I think most attackers would quickly find something easier to hit.