Spoiler: Night explains Endgame. Doing nothing turns her off. The opportunity to do something turns her back on again. Kathryn is too high octane for a pedestrian mundane lifestyle of Sienfeldianism. 2 years of shows about nothing, and the captain would have vented the atmosphere. Howard Huges was impossibly trusting towards the toilet paper he walked on between point a and point b. A few more weeks and Janeway would never have been that careless. Admiral Janeway had 10 years of Nothing after she got home. Ten years of meaningless paper shuffling. No wonder she had to go back to where the fun lived.