Every exhibit Must be Equally Balanced?

Last Thursday, two female activists disrobed inside the Washington National Gallery of Art to protest what they say is a lack of diversity in the artists being featured. One led security on a brief chase before being subdued.  Sounds like a weak protest.  The public, I would think, decides what they will pay to see at an art gallery, a movie theater, or any other entertainment venue.  If the public wants to see art painted by gay, Ecuadorian  midgets, then such a product will draw visitors.  We do not need quotas in Art or any other exhibitions.