Offhand, from the science fiction I've read Dyson spheres make more sense as military installations for the reason you list. From the perspective of an easier

Offhand, from the science fiction I've read Dyson spheres make more sense as military installations for the reason you list. From the perspective of an easier and safer engineering problem even 'wide' "ring worlds" make more sense; those also have the option of using the start inside as a drive for travel. (Probably not very fast, but much like interstellar freight class travel)