I liked that line as well, particularly the slight sarcastic emphasis on good used by the English voice actor.
Rufus had a particularly good time manipulating people and events in AC. If he'd been more open and honest with Cloud and the Turks at the beginning, Kadaj and co. might've been defeated earlier and the attack on Edge might've been avoided. Possibly. However, it was great to see Rufus finally acknowledge the power and value of life, and the importance to preventing the Reunion taking place.