It seems the point is mostly about how to talk about one's art, how to promote one's art, and how to devote a portion of one's time to being an artist. If an artist who talks about his or her own work regularly is being selfish, then I have no problem with being a selfish artist! Actually, some may label me a "gaudy, boring self-promoter". Some may even call me an egomaniac.
Here is the comment I left on the Redbubble blog: