It's more that art usually just isn't a very marketable skill, barring some very competent CGI ability that you'll apply to whatever pays. I think even that is competitive, but people who are folding some tech-y, I don't know if I want to say IT, but hard skills and programming in there will make more money than someone doing say fucking fine art on real canvas.
Making money on just "drawing" is either a lottery without many winners, or about connections, rich kids from the Upper East Side or Upper West Side and their family and friend funded gallery shows. That's the secret nobody tells you.
For genuinely extremely talented people, who are fucking rare, you'll have to move to an animation hotspot and prove yourself as: extremely reliable and dependable, meeting crazy deadlines, doing lots of grunt work, craftsmanship, networking skills, office politics, and all forms of office work drudgery. You will probably not be working on your own ideas. A lot of what you work on will be shit.
The fantasy that everyone has is they have an Idea and they're usually a pretty bad artist. But even if you're a fucking incredible artist, you playing with your little worldbuilding exercise uually isn't going to make you any money and sometimes you won't even get noticed on social media, even if it's very well done, because there are lots of games you need to play to get noticed. Even then, people who get followings are often making pocket change at best, and do it out of love.
Learn to be great at making shit for commercials and apps and it's different, you could actually make money at it, but your job will be an Office Job. Except for the rare lucky few. Actually even they often say it's basically an office job.