The best carpenters are the ones who take great pride in their work and often do little "extras" that may be more costly or time-consuming.
The same goes for writers - the best writers are the ones who put in the kind of time and effort that no one in particular asks of them - they enjoy the work for its own sake.
I'm not saying they shouldn't get paid - I'm saying that no one whose primary motivation is to get paid has ever been a great writer.
That's one Author