Not sure how the author decides what is ordinary and what is transcendent. According to him, there is nothing special about folks creating podcasts, but there is something special about a singer-songwriter. He does not say why. Take https://www.patreon.com/sonicether who earns $50k a month creating shaders for Minecraft. That sounds mundane until you realise that he's probably enabling tens of thousands of people to…
The kind of art he supports already gets plenty of funding. No one seriously expects MOMA or the Met Opera to go bust any time soon.
Patreon is a successful alternative for relatively small-scale public-supported art. Of course it reflects public tastes. That's what it's for.