It's the only way what would work in the modern Treklitverse. Besides which, people like a redemption story. I was actually referring to the events on Trill and the devastation that millenia of secret-keeping wrought on her home society. This is a woman who helped expose one of the deepest, darkest secrets of her own people; the idea that she'd support a cancer at the heart of the Federation flies in the face of that. The Breen mission, while covert and secret, was done under the auspices and regulation of Starfleet and the President and was limited to a specific action. Eh, Bashir's corruption seems fairly natural. Maybe cause he kept his own secret so well, maybe because he hung around Garak so much. And of course throwing the opportunity for romance and adventure at him is just perfect.