Well I'd argue that it's definitely devoting your life to work. It's an activity that you spent a massive amount of daytime doing for most of your life. It may not be the only thing you devote your life to but it is definitely one of them and probably the largest one.

I've never been able to get up after a day of work and do something. I'm just done after working for 8 hours. I'd just sit and do nothing wait to recover "energy" and as soon as I recover back to normal work starts again.