Also, for those who went to college full time, an 8 hour day is a reprieve. Homework, and even a job on top of class usually turns out to be more than a 40 hour work week. I know I was constantly staying up late and waking up early to get my 14 credits of work in to achieve my goal of an A and work to get where I am today.
Speaking as someone who went to college full time myself, no, not always. School is not like work. Going to sit in a lecture hall watching someone talk at you a few hours a week is not like solving programming problems 8 hours a day. Doing homework where the only person your failure will affect is yourself is not like debugging a crash bug that puts everyone on the team's salary in danger if you don't solve it in a few hours. I remember when I left my last co-op work term thinking that going back to school was the reprieve! I've always found that I have much less energy after a day of working than I ever did after a day of homework + classes. I think many or even most people would agree with me.
Of course, and this is with me enjoying my game development job, and I am not particularly interested in changing careers at all. But it is a job.