Hollywood's obsession with mega-productions tends to be an attempt to force-feed mediocre movies rather than advancing the arts anymore
BTW, Coppola suggests 3 rules
1) Write and direct original screenplays,
2) Make them with the most modern technology available, and
3) Self-finance them
Technology has made it trivial for almost everyone to have (2) and (3). Now technology should create avenues for artists to receive a fair compensation for their work, but they should know that it will be nothing like the exorbitant commissions of the past.
Your comment is excellent and made me consider whether an analogous situation could arise with the arts. Clearly it's important to have dedicated, full-time artists, just as we need software engineers. And both professions take a lot of study and practice.
I think professional artists could exist even when they can't sell their end products. For instance, they could be consultants contracted to produce informational or promotional videos for a business. Such consultancies may even create and give away short entertaining movies or something to raise brand awareness and attract creative talent, in the way that software companies often contribute to open source projects.
Additionally, a serial-type scenario could work, where an artistic group is paid up front on a periodic basis to continue telling a story.
So I think in the hypothetical situation where all art is free (or at least freely reproduced and distributed once its been created) it's still possible to have professional artists creating high quality work. Certain things, like $100MM summer blockbuster movies (unfortunately) might not work, though.
Unfortunately, it seems like a lot of the popular artists from the last 20 years began their entertainment careers to get "rich and famous". These people didn't do it for the love of the art, and looking at the decline in quality of the music industry since the 70s I think we can all see how that worked out.
With any luck, taking the "rockstar" incentive out of the music industry means we get less music being made, but of an overall higher quality. You know, because the people who still pursue it are actually artists.
I think of the artists I genuinely appreciate: independent filmmakers, poets, writers, musicians: without time to pause and focus on their work for weeks at a time we would have little of this. Even a well-recorded indie band needs to raise money for a good production. While we may wish to think so, you just cannot record in your garage without thousands of dollars of tools from microphones, mixers, plugins, then marketing and seed-funding for tours. So yes, these people are doing it for the love it and would like nothing more than to see the mega-industry fail: it leaves more money for them and less glitz in the eye to blind us from accessing their work.
It's the craftmanship that takes years.
Art can take anything from 10 seconds to 10 years.
Composers for example may receive some income from the wealthy or, from the 20th century, grants, but are generally teachers (Vivaldi, Beethoven, Schoenberg, most modern-day composers not working in the film/tv industry) or held posts at the local entertainment theatre: the church (Bach, Handel..).