Anybody can make either now... and it's kind of destroyed both industries. Blessing and a curse really. Any stupid motherfucker with a phone can post their junk online (on N-G forums) so why would you ever pay for "professional" porn with an infinite treasure trove of decent pussy and amateur videos available for free.
Music's kind of the same. No one but milquetoast pop stars will ever be millionaires anymore making music but a lot more people will be able to squeeze out a decent living now that labels don't really matter, no one buys music and more money can be made touring.