It has a limit. Lots of talented artists out there still looking for jobs. I know someone looking for a while and they worked on Archer(backgrounds and layout artwork).
As in the amount who can successfully pursue jobs in that field that pay enough to live off of. Even education jobs are having a hard time with pay.
Some types of art appear to look great because of those in the field who are hugely successful, but for every successful pop star or diva, how many people keep trying to make music, make something decent but don't get off the ground? Indie music has its place, but a lot of really successful artists are connected to the industry by family or friends etc, same with a lot of acting talent nowadays.
You could argue other jobs have similar limits but they're usually much more dense.