Yep, the invisible hand of the market is what decides what sexism is. While we're at it we should let the libertarian godfigure define what racism and homophobia are too.
If an artist wants to make something that's blatantly negative against a certain race, it's not worth writing an article to criticize it, if The Market has deemed it not racist by making it sell.
Why would you compare racism and homophobia to nudity? Makes no sense.