I can answer this from personal experience. After working 9 hours at a full time job, a 45 minute commute home, helping make dinner for the family, cleaning up

I can answer this from personal experience. After working 9 hours at a full time job, a 45 minute commute home, helping make dinner for the family, cleaning up, playing with the kids, getting them cleaned up for bed, reading with them, putting them to bed, cleaning up the house a little bit, its 9pm. All I wanted to do is spend a little quiet time with my wife, any motivation to work on personal projects, which may have been fairly strong during the drive home, is now gone, and all I really want to do is spend quiet time with my wife before we had to go to sleep. So, it had nothing to do with making the day longer, and it had everything to do with the reality that by the time I actually got to the point where I could work on something, it was the least important thing in my life.