One of the things I love about Deep Space Nine is that it recognizes that idealism doesn't always work in the real world. At the time of "I, Borg," you had a Federation that was pretty calm for the most part. By the time we got to "In the Pale Moonlight," everything was going crazy. They weren't able to stop a war with diplomacy. Captain Picard had certain luxuries that Captain Sisko did not. And Captain Sisko did the best he could, recognizing himself that if anyone ever found out what he did, he would rightly be in big trouble. He saved the Federation.