> So the author talks about how little money per stream artists make... but how much SHOULD they be making?

The value of recorded music is now zero.

Recorded music having A value was a result of markup on distribution profits. There is now no money in distribution. (There are a lot of parallels between how globalization works and how the record industry worked but thats another conversation).

ML, generative music is coming for the music industry.

Its not hopeless but your Spotify is just a loss leader. It's a gateway to your social media, to your (paid) endorsements and to your shows (another problematic facet of the industry) and merch. There are plenty of ways people with talent and a "voice" can profit. But you better be consistent and authentic.