Passion or love doesn’t have to be part of the work/job equation. The value of work is that you get paid to do it, not that you’d do it even if you didn’t get paid. It even bothers a lot of other writers that my main reason for being a writer is that I get paid to write. Sure I like it, but I don’t like it more than my other hobbies. Writing can be difficult, exhausting when it’s done well, and leaves you a little beaten up (or at least it does to me).
Earlier in the article he talks about the need to be working. That’s when you look around and can’t think of a specific thing you need to do, but you stay at the desk anyway and grind it out...doing nothing important.