You validated my point. The best poet was not motivated by revenue, and althought I do not know, was probably not worried of others disseminating their work.
Creating art for art's sake, not to pay for the offspring's tuition bills.
Even John Keats, the "poster boy" for poetic works of unending beauty and pure inspiration, quit his job as a surgeon-in-training to become a full-time published-and-paid poet. He could've easily worked his day job as a surgeon and moonlighted as a for-free poet by night. His primary goal was to be a poet, and he found the only way to do so was by making it his career.
Even Vincent Van Gogh, the more modern keeper of raw artistic expression, pined for more people to buy his work, not the least of reasons being to fend off abject poverty, but also as a validation of the style he admittedly created. He was resigned in his later years to live off his brother as he painted prodigiously, but by that point he was in the throes of psychosis. Is that what you meant by "art for art's sake"?
It's surely a romantic notion that artists draw forth passionate forms of expression from fending off psychological defect, hungry bellies, and harsh surroundings. But the truth is, every one of those artists to a person wanted to get paid doing what they do. Perhaps the money is a validation, or incidental being a published or culturally accepted artist, or simply a means to an end. Doesn't matter a whit. They want to do what they want to do full-time.
In other words, "Shakespeare got to get paid, son"[1]
Ask yourself what level of talent you would have right now if there was zero money in coding or designing software, and you just did it on evenings and weekends, when you were not working your full time job in retail or food services to scrape by?
There is just something disturbing to me about this idea that people should be suffering so that others can read better poetry on their comfy 100k tech salaries.
That's actually part of the reason why I find it so delicious that there are people outside of Computer Science that are hitting it big in Web and mobile apps; it's a validation that anyone can do the work of a CS grad just as anyone can write a novel or paint a picture; it just takes time and effort and acquiring skills.