You seem to think the arts is a bunch of connected people getting welfare to make terrible-to-mediocre art no one actually wants, and because that doesn't get obscene amounts of funding that the arts as a whole are underfunded. Movies, music, gaming, industrial design, advertising, architecture, publishing, and more are each individually billion dollar industries with an enormous amount of diversity in what is produced. Additionally, hobbyists can go easily semi-pro (or pro) nowadays thanks to websites like Amazon (books), YouTube (movies), SoundCloud (music), Etsy (design/physical art), and Patreon (other). The problem that you are describing is that people who make art that no one wants or people who suck at getting their art to people who like it are not rich. If you make something people like it is easier than any other time in history to make a living in art.