I think this movie says a lot of about America. The capitalist system leads to the most terrible behavior in the most average of people. When money becomes a factor in art, art will inevitably suffer. Obviously the desire of every artist is quitting their job and living off their work. I think this was the intention of the father and when he failed he had to rely on his daughter and did so without thinking of the consequences.
It's also interesting to note that the movie exploits the parents, but that the parents exploit their daughter which is even worse. The poor younger brother as well, "I helped paint that one" and they don't even acknowledge him and never mention the effect of ignoring him while praising their famous daughter. Who's exploiting who here? Even the filmmaker has to acknowledge that he's taking advantage of the daughter by putting her on film and sensationalizing her story.
It's also interesting to note that the movie exploits the parents, but that the parents exploit their daughter which is even worse. The poor younger brother as well, "I helped paint that one" and they don't even acknowledge him and never mention the effect of ignoring him while praising their famous daughter. Who's exploiting who here? Even the filmmaker has to acknowledge that he's taking advantage of the daughter by putting her on film and sensationalizing her story.