Well, stop glorifying 'free time'. Many of my friends spend practically all their free time drinking beer and 'chilling out' watching TV. Yeah, I am sure that's more healthy than we working hard learning something new.
I spend eight hours a day in the office, then I go home and read some textbooks, follow an online class, read a paper, write a blog post, go to the gym, practice saxophone, or hang out with friends. While I find the stuff I do at work enjoyable, I wouldn't do another 6 hours of it a day at the expense of giving up all that other stuff, because it's the other stuff that gets me through the more tedious weeks at work. Fortunately, my employer understands the necessity of doing those other things.
Yeah, lots of people waste their free time. I don't think that working 60 hours a week is any less of a waste for those people.
socializing is important. it is vital to your health. obviously as with anything there's such a thing as too much, but as someone who has been missing work-life balance i can tell just how much i miss hanging out with friends, drinking beer and watching tv.