my biggest criticism about the original Star Wars is that they called it a "Death Star". any evil imperialist organization worth its salt would hire a consulting firm to come up with something like "Liberation Sphere"
If you have such a weapon, then you got to make sure you announce it exists - re, Dr. Strangelove.
No one believed them when they did eventually threaten a planet, and that's why we no longer have Alderaan, causing billions of death, although this has been retro-ed slightly in Rogue One.