I used to believe that when I was younger; a little experience cured me successfully :). It's not that it isn't possible to have a job that also is your hobby and your passion - it's just extremely difficult to find one. That is, unless you're really accepting and easy to please, or young and still in crush with programming. I've seen quite a lot of the latter types among young developers. Sadly, I've entered workforce long past my crush period, so you couldn't make me satisfied with life by offering to pay for making a random website in currently hot framework.

The most realistic shot at really working on what you love is to start your own business, but even then you often have to pivot to something less interesting to you, and either way, in time you're likely to end up doing mostly administrative work.

So yeah, I ended up assuming that work will not be my hobby, and it's up to me to maximize its profit while minimizing time spent on it.