I really don’t agree with this. I know plenty of people who are creative artists and make a living with their art. One of my good friends told me he decided when he was in grad school for art that he wanted a creative life not a run-of-the-mill life and he went out and made that happen. He’s a musician (also an artist) and has been self-supporting with his music for the past 30 years or so. He’s not a huge rock star, but lives a nice middle class existence — owns his own home and studio, travels the world, meets all kinds of people, and has amazing stories, and a great family.
There are many, many opportunities for creative types and it’s a big fallacy that people can’t support themselves making art. You might not be Beyonce or Andy Warhol famous, but you can make a living being a creative artist.
I do graphic design and web design myself. I’m a huge introvert, but even so, I probably know 20-30+ people who make a living with music or art. There’s my friend Melissa (graphic designer), Eric (does museum design at a science museum), Rick (musician, engineer, producer), Jason (filmmaker), Brian (actor, voice actor), Graham (artist and museum and gallery worker), Adam (artist and commercial art director), Dave (musician), Mac (musician, runs record label), Mary (musician), Jennifer (graphic designer), Sue (graphic designer specializing in music), Dex (musician), Jessica (textile artist), Julie (letterpress artist), Steve (animator, musician), Alex (RIP, commercial photographer), Kent (museum photographer), Jennifer (violin maker), Frank (photographer), Mike (museum exhibit designer), Chip (film director/producer/editor), Steve (box office director), Dave (musician), Frank (music venue owner, booking), Kristine (booking agent), David (president musicians agency), Frank (art law), Sarah (art teacher), Greg (festival director), oh and my friend Nick’s son is a pretty famous EMD musician. He decided he wanted to do that in high school and went out and did it. I know a lot of folks who work for record labels too.
And for the record I live in North Carolina, not New York or LA, so not necessarily what an average person thinks of as a hot creative spot, but there is a great creative scene here. A few of my friends are in NY or Hollywood or Chicago now, but most are still here in NC.
I would tell him to follow his interests. The deeper in you get with something be it music, musical theater, visual art, or what have you, the more opportunities become apparent.
I work with musicians (doing design work) and there are so many different roles that the average person doesn’t see from the outside, but once you get up close you get to see the different pieces of the puzzle in action.
There are the band members, but there are also the sound engineers, mixer, producer, booking agents, the managers, the radio publicity people, the “print” publicity people, the album designer, the record pressing plant, the club owners, the promotions people, the roadies, the merch people, the social media person, etc. And this is for a band that owns their own label. Once you get into record labels there’s a whole 'nother level with your A&R person, digital marketing, traditional marketing, etc, etc.
So follow what sparks you and see where you end up. This is what I tell my kid who is going to major in Creative Writing. I don’t know the writing world as well as I know of the music world (and, really I only tangentially know the music world), but I have friends who work in publishing, editing, and, of course, know folks who work as journalists, at bookstores, libraries and teach. There’s not a lot of money or fame in poetry if you’re not Amanda Gorman or Rupi Kaur but if my D22 dives headfirst into it she might find some other aspects where she can be creative and make money.