Then we shall return to the times before the 19th century, when people created art because they loved art, not to get rich. I suspect it will lead to higher quality art, even if the quantity is lower.
What nonsense. I don't think there are many musicians today who don't love art. The problem isn't just being unable to get rich, it's being unable to afford to be a musician at all, and that was certainly not the case before the 19th century (there were plenty of paid positions for musicians).
I think artist will have to focus more on cultivating a strong fanbase globally and leverage it for merchandise and live performances. There is lots of money to be made being an idol.
