absolutely - I'm really not trying to detract from Lena Dunham's work ethic (she's a prolific creator) nor from the thrust of the article which is encouraging other people to be prolific creators.
-- it's just that if someone else is writing a ton and wondering why they can't succeed, it's helpful to understand what other ingredients are involved.
I also think there's some amount confidence in one's prerogative to create and publish, when for example both of one's parents are also in creative fields. Confidence that creating is worth the effort and confidence that if one's creations improve in quality that there will be help to find an audience.