As a college athlete turned i-banker right out of school, you are spot on. I never had so many productive days in college when I had little / no time to do work vs. never had so many unproductive days in finance working 100+ hour weeks. I love Jason Fried's quote on this topic: "Workaholics aren’t heroes. They don’t save the day, they just use it up. The real hero is already home because she figured out a faster way to get things done."