This whole thing strikes me as coming from the wrong direction. Tying artistic and financial success, trying to apply some cargo cult "problem" engineering mentality to art. I feel like these articles illustrate quite well why the academic plastic arts have become so irrelevant today that we could say they are not part of human culture at large, in the sense that they have vanishing influence on public discourse.
Interestingly, most of scientific research is also not part of the public discourse.
> Tying artistic and financial success [...]
If you're referring to the article's description of the study's measure of success, the metrics had little to nothing to do with direct financial gain.
> [...] in the sense that they have vanishing influence on public discourse.
Nothing inherently requires art to be a part of the public discourse. Sometimes artists create art for art's sake, and/or just to make a buck. Sure, occasionally some art makes it big in the public eye and becomes part of the zeitgeist, but the vast majority of art barely sees the light of day.