The intel was “someone’s targeting ex-Starfleet officers”. The dialogue then suggests Starfleet command put together the list of former officers. They didn’t necessarily pull those names from the intel.
With Seven on the list, I wondered if this might be the origin of the Fenris Rangers. By collecting ex-Starfleets and lower deckers, Nick Locarno is gathering castouts who were ignored or underserved by their own people. Sounds a lot like the Rangers to me.