You can certainly "do what you love" after work. I'd argue that that's what 99% of the people actually do, they stand a job they dislike and then they go home or to a bar to eat, fuck, socialize and watch sports.

I think that it's really important to try to find passion in our lives. Not necessarily a passion that is a job, but a passion that is fulfilling.

I know that this is not what the author is saying, but I think it's an important perspective to keep.